I'm 35 Weeks Pregnant. I Had Light Breaded Cat Fish

I'm 35 weeks pregnant. I had light breaded cat fish this past fiday (I was fine friday) and then Today (Monday) I had a cod fish sandwich. Shortly after I started feeling a little sick and had minor stomach ache... a few hours later my stomach pains became really bad and then almost immediately after I became nasuas and started throwing up. ... could it be from the fish? Should I go to the hospital or wait it out? This is my first pregnancy and I'm not sure wrather or not to worry....