Start taking a prenatal vitamin if you haven't already, be careful with deli meats (heat then before you eat them) and make sure all your meats are cooked all the way through. Did poisoning can cross the placenta and cause complications so you wanna be really careful with that. Drink more water than usual. I was told that if weight cups a day is what everyone else needs, a pregnant woman needs twelve. Good luck mama!
Your first appointment is on my due date :) there isn't much you need to do for your first one. They'll give you a pap smear, do an ultrasound and you'll get to see the heartbeat. You'll probably do blood work and get lots of information about being pregnant. Good luck, it's a fun journey!