I think I'm pregnant

I've heard that it's realy hard to get pregnant after you stop the depo shot, I've been off of it for almost 2 years and my periods just started become consistent the past few months. I haven't been on any birth control for the past year, and I'm 3 days late. I've been very sensitive and emotional, and been craving the most random things. I've also been nauseous here and there but it's not always in the morning. Coming from those that have been on the depo shot do you think it's possible I could be pregnant? Me and my boyfriend haven't been trying but I'm really looking forward to having a baby!!