TTC after tubal

Amber
Hello! I am 30 years old and I have 2 healthy daughters, ages 7 and 10. In August 2014 I had a tubal pregnancy that resulted in me losing my right tube. My husband and I have been ttc since November 2014 (after my OB's approval of course) with no luck. :-( We have had sex every other day, right to the day of AF, for the past couple months and I thought for sure we had succeeded this month! My period was due April 4th and about a week prior to AF I cramped, was bloated, my breasts were super tender, and I had a very big appetite (which is very unusual for me as I never have a huge appetite). But then AF reared her ugly face on April 6th. :-( I had what seemed to be a normal period. Now, 5 days after AF has ended I'm having a brown discharge, constant headaches, and feeling super nauseous. My husband and I have not had sex since the night before I started my period (April 3rd). I took a HPT on April 5th and got a BFN. Is it possible to have my period but still be pregnant?