Had some sushi last weekend and was feeling sick all night, a week after ive been feeling something moving in my belly but i am not pregnant, my stools sometimes are loose sometimes not i feel sooo bloated. can it be parasites? if so, otctreatment?

Parasites: While having parasites is always possible, it does not appear likely in above scenario. The diagnosis is relatively straight as a stool sample has to be checked for ova and parasites and your primary care doc would be your best reference in the process. Otherwise there is no OTC prep that I am aware of that will work against all possible parasites.