TTC after miscarriage - missing period

Elizabeth

So, my first pregnancy ended in a second trimester miscarriage. The doctors said it was due to chromosome issues.

Fast forward to now, I've had two regular periods, and now I'm missing my third. I was excited, because my husband and I have been trying again, but the pregnancy tests say negative. I've missed it by two weeks. Should I ignore the pregnancy test? Can they be wrong?