mostly food borne illness and parasites. namely listeria. basically, you don't want to get food poisoning while you're pregnant cuz it dehydrates you immensely and could increase the risk of miscarrying.

it usually isn't a problem if the fish is fresh and safely processed.

Have some mercy. Don't kill. Nature has given us so much to eat

Yes, you have done the right thing. Alcohol is not only bad at the body level. It is extremely bad for the mental and mind level. Our goal should be to improve our awareness of present moment and alcohol is inversely proportional to it