20First Things First: Are You Actually Pregnant?
This one seems like a given because there is no way that they are going to try and confirm the pregnancy at the last prenatal appointment. At your first prenatal appointment, they are likely going to confirm the pregnancy before getting started on anything. At-home-pregnancy-tests are very accurate when used
properly, but there is some margin for error, so they need to know for sure.
Most doctors will send you for tests which are more accurate. Some may also have you do another urine test in the office to confirm. These kinds of tests can also be helpful in determining how far along you are based on the level of HCG in your system, though only an ultrasound is going to be pretty exact.