So my periods are normally every 24-25 days. We TTC for a couple of months and then didn't try and then tried again last month. My last period was April 12th so I should have started Wednesday or Thursday. I have taken 3 tests and they are all negative. I am never late so this is very unusual for me. Has anybody had this happen? I am anxious because I am on a medication for migraines and if I get a positive I want to stop taking it. It is a blood pressure med but from what I have read it doesn't have any effect on your period. So I don't know whats going on!