I had my first depo shot april 21 and thats when my period was. i had PROTECTED sex may 25. I have no idea if the condom broke or not. i wasnt paying attention. I had spotting june 3-8 and i had headaches and cramps. itook a pregnancy test and it came back negative but with an EXTREMELY FAINT 2nd line. My period was late but came june 10 and lasted about 2 weeks. And then i got my next period july 12-17. I wake up kinda nauseas every morning, its normal though. i also feel a bubbly feeling in my abdominal area. i heard women can have bleeding throughout pregnancy which worries me. Am i having decidual bleeding? could i be pregnant? Ive also been really upset and stressed over the past three months. idk if this is a cause of anything.