will i ever be able to smoke weed again?whats wrong with me?

im 16 years old and diagnosed with OCD i took prozac from ages 12-15 at 15 i started smoking weed but i stopped couse my school almost cought me at 16 i started smoking again and it was great exept this time i was getting disconnected from myself and reality or at least getting paranoid that i am i kept comparing stuff i did before getting high to now and see if how the are recieved in my brain changed i also just feel something diffrent i dont feel real after consulting with an epert who told me im at risk of psycosis i stopped will i ever be able to smoke again? will it ever be like before i almost got cought back when i was 15? is it age related or is it just my mental backgroung? and is what im experiencing considered depersonlization or derialization?