Sad/depressed feeling? BUT WHY?? Anyone relate?

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 feel like there’s no way out of this. everyday i’m anxious and depressed from these thoughts. i feel like i have to constantly question if it’s OCD or not. the panic attacks are insane and i freak out. and a compulsion i have is looking eveything up on the internet when im stressing to know that it’s just my OCD and im not in danger. but looking things up add on to my thoughts and i start thinking “what if” actual suidcal people think. do others with this theme whenever they do something like if im taking a picture it’ll be like “yeah you look happy people will wonder what happened when your gone” LIKE i DO NOT want to end my life. or even as simple as cleaning my room, “yup keep it clean so when your family goes through your stuff” then i panic and can’t even do anything. those thoughts distress me so bad. i’ll sit there and think how good my life is or when im having a good day my thoughts will be like “NOPEEE what if your just saying that to convince yourself” it never shuts up and genuinely makes me think i have SI or something. i hope this reaches the right people just to know im not alone. Even when i do get better in the back of my mind it’s always “people who want to are the same a day before too” im genuinely scared and im scared one day im going to just snap and do it because its “too much” do i need to go to a mental hospital! i feel insane.

Can OCD mimic depression? With this theme I’m always wondering if I have OCD or depression. It first started out as harm OCD and now this. Today I told myself if I did have depression then it’s treatable and I would work on it. Then I started to feel depressed and emotional and like had an urge to google the difference. When I did this I just broke down because I felt like I related to them, it made me worse. However when I look up OCD symptoms it makes me feel better. So now I’m unsure. Almost like OCD wants me to believe it’s depression