I've been using the depo shot for almost a year now, and i've gotten every shot on time. My partner and I use the depo and the pull out method as our main form of contraceptive. I got my last shot on june 1st which was 5-6 days after my period and my period was due about 6 days ago and it hasnt come yet. I've also been experiencing some fatigue and pretty intense nausea. Im worried i may be pregnant. Is this possible?