My last period was August 30th, 2013 it lasted for 5 days. After that I had unprotected sex a couple times before my next period was due on September 1st. When that time came my period never started. At 10 DL I had a P test done at the clinic which was -, at 2 WL I took another hpt that was again -. Around November 18th I went to the doctors an got another pregnancy test done it came back negative. The doctor told me that I maybe did not ovulate which caused my period to not come on an that my period should come on the beginning of nov. I've gotten light cramps a few times but nothing major an still no period. Last night I had sex an afterwards I had some cramping and some spotting. The spotting stopped a couple hours later and I went to bed. When I woke up this morning 11/5, I started bleeding again around 9 something. Went back to sleep an when I woke up around 11 the bleeding was heavier plus stronger cramps. Now around 2 the cramps are really bad and the bleeding is still heavy. I have a lot of pressure in my lower stomach right above me vagina. The pains are now very sharp an don't last long. Could I have been pregnant an am experiencing a miscarriage?