I've been on Loryna birth control for 9 months now. I was due to start my new pack on 4/7/17 but my pharmacy was unable to refill at that time since they had previously filled it for an emergency 3 month supply. I started my period on March 30th and finished on April 7th and have ALWAYS been consistent on starting my period on the last week of the pills but my husband and I had un-protected sex the week I was waiting for my pills which happened to fall on my fertile day. I was due for my next period on April 27th but have yet to start and I took a pregnancy test and it's negative. Is this normal?