I quit eating shrimp ... sea bugs.
I only use organic rice any more and I sprout it rather than cook it.
I'm so sorry to be the bearer of bad news but sometimes the chemotherapy poisons alter how our body's receive things. Sometimes it is actually for the better.
I ate at a restaurant with friends the other day and, since no salad was offered, I ordered some spinach with rice thinking how bad could it be? I did not get chest pain but I did toss those cookies and felt better for it too.
Our oceans and the Gulf are not so very clean any more and the sea life suffer because of it. I wouldn't eat a Gulf shrimp unless you forced me at gunpoint. The oil spill and chemical dispersants are affecting living sea things somewhat dramatically.
Some of the food being offered at the market is different than what you expect. They are genetically modified and nothing Mom Nature ever prepared you to be able to digest. I don't know if you had something like that or not. Natural shrimp is high in cholesterol. White rice is somewhat useless to the body in terms of nutrition.
If you were on chemotherapy, your liver has taken a beating too. Try something bitter (dandelion, endive, escarole) to clear out the bile ducts and, if you like, try those foods again.
The easiest thing would be to eat other foods, would it not?
Sometimes I get long winded. Sorries. You may simply now be sensitive to something to which the shrimp was exposed or a persticide on the rice. Go organic for a while and see if it helps.
Mange. Mange a` sante.