My last period was January 28th, today is period day 56! I've taken 4 at home tests (2 two weeks ago, 2 this week) all saying NEGATIVE. My periods are always rather regular and never been more than a few days late. Did go to the dr and he did a test that came back negative as well. Said to return in a week if still no period. Should I be concerned? I'm worried I may have a hormone problem of some sort since all tests are coming back negative.