OCD affected my college experience/grades (18+)

Ever since my OCD started manifesting around the last year of high school (I was 17 at the time), my grades started suffering as a consequence. Before that, I used to be top of my class, taking the most advanced mathematics and physics classes and acing them, both in terms of grades and my understanding of the subjects. As the last year of school approached, my obsessions and compulsions started acting out and I would find myself cleaning the bathroom late at night (sometimes for a period of 4 hours) in fear that any of my seminal discharge would inadvertently lead my mother to getting pregnant. The thought of that would leave me paralyzed in fear and I could not fall asleep until I thoroughly cleaned every spot I thought I had touched in the bathroom.
These compulsions and obsessions followed me to college(in which I had been accepted into its engineering school), where I would get paranoid from even being on the internet. I would also obsess about doing the "right" things in life and so on... My obsessions became so powerful that I would refuse to go to class and would spend almost the entire day either sleeping or reading up on laws/ethics, in fear that I had done something bad. Unsurprisingly, my grades suffered because of this(the fact that most people in my university were cheaters didn't really help either) and although I did an internship in which my mood became considerably better and in which I was hailed as "the best intern they've had", here I am in my last year, barely passing and still struggling with getting "anxiety/obsessive paralysis" and actually getting school work done.
I have been on SSRI's for the past 3 years and have been seeing a cognitive-behavioral therapist for the past 6 months or so.

Hmm. I get work anxiety. I don't like not doing everything exactly the way it's supposed to be done. I get very uptight. and anxious