Contamination OCD

Hello, I am not diagnosed with OCD but after researching symptoms I feel as though I have contamination OCD. I have always felt this way since I was little, and have major anxiety. Starting from when I was small I would be terrified of going on field trips because I could not pee on the bus and was terrified of peeing my pants. Same with road-trips, I would make my parents stop once an hour. During middle school and high school this went away. Then in high school I gained the same feelings about throwing up. I was terrified of puke, puking, etc. in every room I entered I made sure I knew exactly where the trash can was (I am 20 and I haven’t puked since 5th grade so this fear was very strange). In college I felt nauseous all the time, even though I knew it was in my head. It felt so real. It stopped me from doing a lot of stuff, and made me struggle in school. For the past 8 months I have been free of any of these thoughts about puking or urinating. Just recently, in the past two months I feel as though out of NOWHERE (has not happened since I was small) that I am going to pee my pants. I have never peed my pants, and this makes me urinate so much. In certain lectures I can’t focus because I am constantly watching the clock to leave so I can pee, because I feel it if socially unacceptable to pee twice in a one hour class period. It is holding me back in school. It is only like that in certain classes, and enclosed spaces. What should I do/ is this OCD?