pregnant?

Ok so I had a baby 10 months ago and since about 6 weeks pp I've been on the depo shot I recently went off depo because I had constant irregular bleeding but lately I've been feeling different I'm noticeabley bloated I have to pee every 20 minutes and I'm crazy emotional like just crying because I miss my bf and he's at work also I haven't ever had heartburn only during my last pregnancy and it was keeping me up last night so my question is it possible to get pregnant on the depo? I took a test but it was negitve maybe it's too early to tell I'm not sure