how do you know what’s obsessing and what’s not? i feel like everything i do is an obsession and i’m not sure how to even go about life

i’ve been dealing with this “thing” since i was 15. (i’m 23 now) if i have a bad memory that i have done when i was really young or just an intrusive thought i feel like i need to tell my mom or boyfriend. it’s been on and off ever since but since January hit it’s been an everyday thing about the littlest things. mostly about my relationship. an example is i was talking to someone random at my job and we were talking about taxes and when im in deep thought or just thinking i do a thing where i bite my lip (not in the sexual way) and i had a thought when it happened “was that sexual?” and i felt like i did something wrong and i went for a while thinking that until i told my boyfriend about it. or like my ex’s face has popped up in my head in the most inappropriate times and i feel the need that i have to tell him. (my ex was not a good person) i feel like im a prisoner in my head everyday, trying to justify thoughts or remind myself that its just a thought. i didnt know that this was or could be a form of ocd. it runs in my family but i’ve just never considered it being this. i always called it anxiety or depression but i always felt like it is more than that.

i’m a new user on this app, I downloaded it just cause I was curious, I don’t really know if I have OCD. Because in school all I learned about OCD is things being out of place and having it to be perfect almost like perfectionism, but I’ve just recently realized there’s a whole kind of different types of OCD, some things I struggle with daily is a fear of bad things happening or almost like an impending doom of when is it gonna happen? I’m always in my head thinking feels like I’m having multiple conversations at once. Sometimes it doesn’t even feel like I’m having a conversation with myself. I have horrendous anxiety about everything and anything talking to people being around people. It just feels like it consumes my everyday life and I don’t know what to do. I can’t clearly remember anything from my childhood and some things I feel like I may be imagining I just don’t really feel like a person. I’m always thinking the worst in my relationship over analyzing and stressing out thinking of scenarios or thinking, my boyfriend‘s cheating on me. It almost all feels out of my control.

How to know if you actually have it or if I’m just making up the symptoms? I have a lot of intrusive thoughts constantly and even have a “theme” but it really surged after I search up what I was experiencing, but then again I search up a lot of what I experience and constantly have to recheck things. My parents say I’m normal but I know I’m not, (both of my siblings have adhd) I find it immensely hard to focus from turning 17-18. Please let me know what you think l! Thanks!