Health anxiety - brain tumor

My mind keeps telling me “something is wrong with you. the weird feeling you are feeling or the weird tingling you are feeling or there is a weird mark on your body. Those are actually a severe symptom and by ignoring it you could die!” Or especially the constant, “go to the emergency room because this impending doom you are feeling, yeah that’s because your gonna die shortly” It doesn’t help whenever people say “well if something was wrong your body would tell you” because my mind keeps telling me that what I’m feeling is proof something is wrong and I need to get it checked out. That I actually am severely sick and that I need to get it checked out as soon as possible, that if I get one more test than I’ll be okay because it will prove nothing is wrong. How do I tell my mind that it’s just anxiety whenever my mind keeps telling me “well if you keep saying that you could be ignoring something more serious.” Or “the doctors are just brushing you off..something is wrong with you” It’s hard to live with my thoughts whenever they are constantly coming up with ways to challenge me and challenge logic. New reasons on why I need to get this checked out because “I’m just being ignored” or “no one is listening to me so I’ll just end up dying” My symptoms range from weak and shaking legs and body to dizzy and unbalanced and dissociated. Recently I’ve been getting this tingling feeling inside my head and on the back of my neck. And my temples have pressure on them. My body keeps coming up with new symptoms I need to worry about, whenever most of them are probably caused by severe and constant anxiety. So severe I can’t even leave the house because I constantly worry about whether this is severe and something will happen if I leave the house. I need immediate ways to start fixing this because it’s especially horrible whenever my period comes around and my anxiety/depression is already higher than usual. I’ve even started considering taking medication (Zoloft, 25mg) which is another trigger for me, I worry about the symptoms I might get from taking it. That’s how you know it’s gotten pretty bad whenever I’ve come to taking something that I’ve been actively avoiding. What are your thoughts? Do I take the medication? What are ways I can deal with my symptoms that seem so severe in the moment but pass by once I’m not anxious? What are ways my thoughts can ease and I stop taking every symptom as something serious, because at the end of the day my anxiety is most likely the reason I have these horrible symptoms. I’ve always been extremely healthy and everytime I go to the doctors they express how healthy I am with all the tests I’ve had.

I haven't been officially diagnosed with OCD but when I learned more about it, I never related to anything more. A little back story: when I was younger, there were a couple of youth suicides in my area and the schools felt the need to have someone come in and talk about suicide. Well the person they had come in did a horrible job teaching it and basically made it seem like the smallest negative emotion or feeling or change in behavior made you suicidal. This ended up scaring me so much that I got horrid anxiety. Fast forward to now, Everytime I feel anxiety and panic, I fear I'm going to kill myself. Everytime I feel down and depressed, I fear I'll end it all. I'm scared to be around anything sharp because the "What if" I hurt myself comes into my mind. There are always intrusive thoughts at almost every point of the day. And it's not only for me. Everytime I hear someone being negative, I fear they will be suicidal. I know in my heart that none of this is true but it's terrifying me that it's stuck around so much that it makes me scared that maybe it is true. I've had a lot of death in my family in the past year and a half and a lot of other family drama that I'd never had before that is now also bringing up existential intrusive thoughts. And I'd never questioned anything about life before but now I get the "why is life like this?" and "does anything we do matter?" and I hate it. I don't want to think like that. I just want to go through life being able to handle things normally again. It terrifies me even right now going "what if you give up?"

I don't know what to do anymore, the fear of psychosis and schizophrenia is so bad in so hyper aware of everything I hear and everything I see, I've always had eye floaters now I convince myself that it's really me hallucinating, I've always had tinnitus but now I'm convinced it means I'm going to go crazy soon, I can't sit in quiet because all I'm focusing on is what I'm hearing, and searching for any sounds I can't distinguish, when there's background noise I get so anxious if I think I heard something but im not sure I did or I'm just anxious, I'm terrified I'll start having delusions and sometimes my brain confuses some sounds for other sounds for example say I'm hyper focused and I breathe and my nose makes a whistling sound my mind interprets it as a scream and I freak out thinking I'm hallucinating only to focus closer and realize it's my own breathing, earlier I was so anxious that I couldnt tell if I had an intrusive thought or heard something, I don't know how to make it stop, I've been through this theme before I just forgot how hard it was I'm having a panic attack please help