been watching the start of tiktok videos 4 times

I think I have OCD since last year but I just realized that I’ve got OCD this year even I haven’t been to any mental clinics or hospitals to test if I have OCD or not. I realized i have OCD this year when i watched movies or videos but i feel like to watch them again and again to check some specific sentences in that movie. Like if that video has subtitles and there are always have some phrases or sentences that make me read, look at every single words of that thing. Even sometimes i check that thing just want to know at the end of that sentence has a dot or comma, kind of like that, i know it’s hard to describe about these situations for me even i know checking these things doesn’t help me anything in my life but the more i watch, read and focus at any details in anything i look so when i remember about something that i watched or red, if i cannot remember exactly all the words of that sentence in the movies, videos, post i feel like to check just know what it is again. Most of my compulsions are related to anything i look, watch or read in my phone. Even sometimes i feel like to check if that is just an account name of anyone, comments on social medias. And before i had so many bad problems with doing things to just “feel right” after i watched those movies and videos. There were some rules that came in my mind so when i watched them again - i had to click this, touch this, replay this over and over again in the video or even look at video duration at the end. There are so many things that i did before that i couldn’t describe enough but i just want to say i used to want to complete many missions in my mind to just feel right or feel completed. If i don’t complete that stupid mission (i called it stupid because i kept me stuck with my life), I’m gonna do it again and again whenever i free until i finish it. At the moments, i don’t have any stupid missions to do about those things i watched but still have some thoughts about them and want to check to know what they are. Can anyone help me with my problem about OCD? My English can not be really good as I’m not a native English speaker. Thanks.

And what is happening...let's say I come across a video of that person and then I stop the part where it triggers me and I deliberately imagine images of a sexual type, and if I don't feel anything, I look again, as if I want it or I have the urge to imagine it, i.e. I feel the need, and if I feel something or get a feeling in my groin and I feel like I fall into despair?

I’m stuck in a loop, I can’t stop avoiding the thoughts by watching tik tok, I’m paralyzed on the couch, I’m searching for clues everywhere that something bad is happening I don’t know how to go on like this anymore my fears are so strong so present they feel so real. Any mention of the future sends my whole body into panic. My arms go numb, I can’t keep living like this i feel like I’m going crazy