Been on depo almost 2 years i have had a regular period 2 weeks before my depo shot is due since i started on depo last time my shot was due i didnt bleed til 1 week after i was due it was brown bleeding and only lasted 3 days i was late getting that shot by a month now im due for my next shot and bleed at the regular time but it was brown and pink and only lasted 3-4 days and i barely bled i have also had sore breasts expecially my nipples, i have had nausea and heartburn, been peeing alot more even waking up from a dead sleep having to pee, eating alot more my fiance and i had sex during the month off depo as i thought i was still protected since i was switching doctors and didnt know i was late getting it i am planning on not getting my next shot and switching to the pill but is it possible for a pregnancy?