i was on the depo for 5yrs, if i would have gone for another shot it would have been on nov 18th, but since then i have unprotected sex twice the first time was about 5 days after i would have had the injection and i thought i may have been pregnant, i took 4 test all at different times all were negative. but i still have not had a period, been gettin cramps on and off and today i developed very sore nipples. is this what is expected after coming off the depo after being on it so long or am i pregnant??