HELPPP PLEASE!!!! no period for 2 months and I'm on the pill

Another month and still no period, negative test. I'm always so regular and my cycle of course with the pill is exactly 28 days, <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> says I'm 28 days late, my last period was April 5th.
I'm on the pill and I was so worried about pregnancy not because i wouldn't want it but because I didn't know if I should keep taking the pill, I went to the doctor mid cycle, so it was like 2 weeks ago, she did a pregnancy test which came back negative, anyways, I finished another pack of pills and nothing !! Has anyone experienced this before? Please I really need help, I have been having some mild cramping but no AF, why is this happening? I knew a month with no period was ok while on the pill, but two?! HELP MEEE