Ok so according to the <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> I have gone 73 days without a period the longest I've gone is 53 I took two tests both negative each a week apart so I'm afraid to take another one  cause it may say negative and I don't want to waist it.. I don't have insurance ATM so can't go to a doctor.. has anyone ever gone through this?? I don't understand why the tests would be negative if I haven't had a period..