Take a deep breath. And relax.
GP/midwives will all refer you to the NHS website which has a neat handy list of things you can and cannot eat.
I find it useful to also understand why.
For a start : drugs and smoking significantly affect the foetus. So does alcohol although evidence on the quantity of alcohol that’ll affect a foetus are mixed. NHS advice is strongly to completely avoid all three while pregnant.
The other big risks are listeriosis, toxoplasmosis and other bacterial infections. Basically you don’t want to take even the small risks one would take before when it comes to food. Pre pregnancy I might cut off the moldy heel and eat the rest of the bread, now I wouldn’t risk it.
Toxoplasmosis is undetectable and has no symptoms for you but will have a bad effect on foetus. Transmitted from undercooked meat, cat litter, gardening etc. If you’ve always had cats etc you’re likely to have had it before and be immune (I am, a blood test will tell you). If you don’t know, you need to avoid changing cat litter, gardening and any meat that’s not medium-well to well done.
Any processed meat should also be cooked, so pepperoni on pizza is okay, but cold deli meat etc is not.
Listeriosis comes from food that has water in it where the bacteria thrive. And is killed off by heat. So cool or room temperature liquid-y food poses this risk. Hard Parmesan is okay, goats cheese on pizza or a baked Camembert is okay, but a soft cheese sitting out at room temp is risky.
Does that sort of make sense?
Sushi is down to individual preference. My obgyn said okay to tuna and salmon because they are frozen at source anyway, but no to any other sushi,
No shark or any mercury containing foods, tuna only one portion a week. Because otherwise mercury builds up to unacceptable levels.
New advice is that soft / runny eggs are all okay now, previously not.
Go through the website, learn what the risks are - then it makes it easier to remember what is okay and what is not. Otherwise just memorising a long list feels tedious and illogical.
Wish you a safe and pleasant pregnancy!