I think you have this specific ocd thoughts because of taking drugs.. from my own experience I had a person in family who died because of meds overdose and I'm also paranoid that in my food, drinks, there are meds everywhere. I can't even take simple vitamins without thinking it could kill me. asking my mom if there's nothing in food, if it is right med etc helps a bit. you could ask someone from family or friends if there's no lsd in wather etc too. and in your place I would never ever try any lsd, acid anymore, drugs can **** up mind a lot.