What to expect ...

Elizabeth
This will be my first baby, and I'm curious about the doctors visits and what to expect. At my first one they did a vaginal US to make sure everything was viable. I know only 2 Ultra sounds are common during prenatal care, so my question is what should I expect at these appointments? My last pregnancy was a tubal and I'm so worried about miscarriage, do they check for a heartbeat each visit to make sure the baby is ok still? I've been ready stories of women miscarrying at later weeks, or no heart beat being found. Thanks !