Had an abortion about a year ago and I'm freaking out.?

I've been on Depo for almost a year now and had random spotting and all that shinanagens. A few days ago I started feeling sick and it made me think of morning sickness and I panicked. But it was also really hot and every time the weather changes drastically I get a little sick. I'm also one of those people that chugs water ALL DAY. My are pink, I have no extra veins, no cravings, no excessive eating... And I haven't felt sick since that day. But the problem is that I can feel my bladder or uterus or something down there when I poke my stomach. So...could I be pregnant or am I just being a hypochondriac?