Seafood should be fine as long as it has been previously cooked/frozen-so no raw prawns, but the pre cooked pink ones are fine, iyswim. It is only the risk that raw seafood might not be cooked thoroughly that is the issue not the seafood itself. That's why sushi is actually ok to eat-the raw fish has been previously frozen in all pieces of sushi. Try not to eat anything that contains vitamin A as that can cause defects so pâté etc. I am the youngest of lots of siblings so have had this all filtered down to me!
WRT exercise, I've been keeping up my Pilates sessions, but have felt a bit funny doing any exercises on my front-don't know why as I'm sure it is fine!