63 days since my last period

I stopped taking oral contraception last July An my periods had been regular last 3-4 days An my cycle ranging from 33-45 days. 
My last period started on April 10th and I haven't had one since. I've had cramps and acne but no period. I've took 3 pregnancy tests An all negative. I'm 32 and worried this is a sign of something more sinister. 
Any advice would be welcome and calming to my overactive imagination