Advice on how to fix this?

Good morning, I have been noticing more and more that I might have OCD. I am currently a student and this is causing me to slack a lot during school. I am a student who has a 504 plan (accommodation for my mental health) and would like to add this app on my 504 due to my school having a no phone policy. My question is, how can this app help me while in school? What are things that can happen during school that might lead me to using this app? I am new to this app and barley finding out that I might have OCD. If any clarification needs to be made on this post please let me know! :)

My son has ocd and its been pretty stable for a while. However, a few years back he had intrusive thoughts ocd and could not be in the same classroom as this one girl who claimsd she was raped and told many stories of abuse. He also could not be in class while they were learning about drugs (like a dare program). Fast forward three years later(everything ok during past 3 years) and hes telling me he saw a picture of these “satan kids” sitting in the seat he sits in his history class. He had an ocd trigger and was going to cut class. He somehow managed to get through the day but when he talks about returning to school on monday, he says he needs to change his seat and his friend who used to sit next to him will need to change his seat as well or he wont be able to be by him. What do I do? Do i convince him to not change his seat or tell him to ask teacher to change seat? Help..i dont want to go back to the way it was three years ago,

17f I was taking a bus and there was a group of children taking it too, like a kindergarten group. I tried to find a place where I thought children are not going to sit but one sat next to me anyway And the thing is that when I need to pee I become a bit physically aroused? Idk I've googled it and it's not that uncommon. Also the vibration from the bus gives me a bit of a groinal response yk since I sit on a seat which vibrates I mean I wasn't even really aroused that much it was a light sensation which was easy to ignore because I was on my phone But im scared I'm like a predator or something cause I didn't leave the bus immediately and had a groinal response when the kid was next to me I dont worry that it was the kid who was the reason of it (I mean not yet maybe I will freak out about it later) I'm just scared it's not appropriate to feel something like that while im next to a child even if he is not the reason of it But I tried to just ignore it and thought that I'm probably being dramatic After couple stops I got too anxious and got off the bus to wait to the next one which I hoped is not going to be full of kids But I'm scared that I'm a bad person and a sexual predator cause I didn't leave immediately after I had this thoughts While writing this post I got on another bus and sat at a seat but there js a child on the bus too not next to me but still not that far from me but I'm scared because of social anxiety people will look at me weirdly if I randomly change seats after I already sat but at the same time what if I'm being a pervert Like I don't even see the kid and stuff but still I'm scared am I a pervert or something Like is it predatory to be aroused near a child? Like the child is not the reason of it, u just are, and I wadnt purposely making myself aroused I just couldn't really help it But maybe I should've left the bus immediately? I mean I did but only after a couple stops because I thought that maybe is not that much of a big deal and I'm being dramatic