i went to doctor a few weeks ago and he gave me some pills to start my cycle back because i havent gotten one back because of the depo shot, which i was on for 1 year and got off 9 months ago, and he also gave me birth control pills, and he told me i should get my period back sunday, then i should start my birth control pills. so i took the pills that were suppose to start my period back , i stopped taking them on the 3rd day because i was feeling sick and had a bad headache, then the next morning i woke up feeling really sick and had cramps like a period but no period. i remebered that me and my fiance had unprotected sex 3 weeks ago though, and i havent gotten a period back yet, and i been having to use the restroom alot.. could i be pregnant or what ?