I was on the depo provera birth control shot from June-October. I didn't get my period while I was on it and for awhile after. I first got it again at the end of March/beginning of April. Then April 13th I had unprotected sex. Exactly 14 days after the sex I took a HPT and it was negative. It's been 6 days since I took that test and I still haven't gotten my period. Could it be from the birthcontrol shot messing it up? Did I take the test too early? Help please