pee in a cup (and every appt after that)
BP, weight, vitals
they will probably order blood work (cbc, hiv, etc)
They may or may not do an ultrasound. Some docs do for dating, some only do the anatomy scan at 20 weeks....it also depends on your insurance (some will only pay for one ultrasound)
and they will give you info (what to expect, what to avouid, etc) and answer questions
They'll probably get a health history from you, draw blood, and have you pee in a cup. They might do a pelvic exam and I had a pap too since I was due for one. The u/s will depend on the office you go too. Some do a lot while others don't do them unless medically necessary. They might also try to listen to the baby's hb with a doppler but it could be too early to find it. We were able to hear it at a few days shy of 10 weeks and I was pleasantly surprised.
ETA: I just wanted to add that I've only ever had abdominal u/s. They've always been able to see everything without needing to do it vaginally, even with my early u/s at 6 weeks 3 days and 8 weeks.
At my OB:
pulse/blood pressure, weight check, vaginal ultrasound to confirm pregnancy, and they give the orders for bloodwork which I go to a lab to have drawn.
oh, and he also goes over what to eat/not to eat, exercise, and gives pamphlets about the optional screenings (Down Syndrome, and Cystic fibrosis)