Good evening, could you tell me if anyone has had something like this?…

Good evening, could you tell me if anyone has had something like this? Three days ago I ate something wrong, started feeling stomach pain, yesterday all day diarrhea, vomiting not, today for three days my stomach is spinning, very strong spasms. I drank chamomile tea, then kefir in hopes that it would clear things up. In the pharmacy they gave me omeprazole, said it would help, but it hasn't helped yet.