Okay, I'm 17 years old. There should be no way, I mean NO way that I could be pregnant. I'd already be minimum 31 weeks along (because late january was the last time I had sex, protected) and on the contrary my stomach has only gotten smaller. This year has been freaky for my cycles. First three periods were regular flow with cramps, that came every 27-30 days, then there was a light one 27 days later, which I suspect was because of my bulimic phase, but I don't know, then all my periods after that have had shorter cycles but have been getting more and more back to the normal flow that I had. Last months period was already fairly normal flow and came on CD 30, now I started my new period after days of having pms (bloating and sore breasts) on CD 32 and it's ridiculously light, but I'm still have awful cramps. I'm still on day 1 and hoping that it would pick up tomorrow since I tend to start out light, but could this be because I did a lot of exercising in the beginning of my cycle and then after a long flight home I haven't really slept well and life has been stressful in general. My weight has stayed the same, even though my frame is slightly smaller now (probably muscle mass growing and fat burning, I don't know?). Please all help is appreciated, I can't get to the gyno until next month or maybe even October! And no, I'm not on any hormonal birth control.
If you had sex, even with a condom, there could still be a chance you could get pregnant. It could be an underlying problem that you should have checked out with your gynecologist. If you can't get to the gynecologist until next month, you might want to consider Planned Parenthood. They have healthcare professionals that should be able to check you out and answer your question.