Almost a week and a half ago I had protected sex with a stranger (stupid, I know, and I will never do it again). I was so worried, that the next morning I took PLan B. I had some fairly intense cramps for a few days, then started bleeding 3 days after taking Plan B. This was the usual timing of my period, so I didn't think anything of it and was relieved to start. The flow was a little heavy and I am still spotting, both of which kind of uncharactersitic for my periods, but I attribute it to Plan B.
Last night I began having off and on back pain, and I'm still have cramps (less painful, but still there). Again, I didn't think anything of it, but then I read somewhere that those are also signs of pregnancy. Is there any chance I am pregnant? I've searched the internet a lot, and haven't found anyone inquiring about symptoms lasting this long after heavy bleeding. Also, haven't found too many people discussing back pain.
Please help!