I have just started a new diet program that includes some fish when I realized that seafood made me sick! Funny thing is, I have not eat fish much before, to be honest, I cannot remember last time I ate it. Now I am miserable, not just because my diet will not work, and I will have to change it, but because there is something wrong with my health. I have always considered myself a healthy person and now this!
I assume that you have scheduled an appointment with your doctor. You have to see what is wrong with your stomach, why it cannot process seafood. I mean, there could be some underlying condition that you are not aware off that is giving you problems. Then again, perhaps you are allergic to some seafood, not all (it would be a bad thing if you would have to give up on fish!). Anyway, I advise you not to experiment on yourself until you consult your doctor.