any ideas

so its been like 4 years since i have had pretty intense ocd , i am 20 and do remember some weird things that i have been doing since i was a kid but shit hit the fence during 2020 and has been on and off for the last 4 years recently i went to a psychiatrist and got the diagnosis , i have know about it , i have gone to therapists who have told me that i do have ocd but couldnt give me a formal diagnosis. Now i got the diagnosis and the doc also sayed that i could get on lexapro to see if it would help but i dont really know , right now i am doing kinda good i also have pretty intense depersonalization but its not really that bad right now so what should i do i am in univeristy majoring in computer science and my day is really stuffed so idk if: 1 this will make me unable to work or 2: worry about seretonin syndrome or being allergic to the meds or that i have been lying about ocd and that i actually dont have it and that the meds will mess with me even more also how would the lexapro affect the depersonalization

sum:got a diangnosis and was asked if i wanted to get on lexapro but i am worried about what should i do thanks for reading have a nice day