Okay, so I've had normal periods since I was 11, and I'm now 18. My LMP started on April 5, 2012 and ended on April 10, 2012. About 6 days later I began having these terrible cramps that felt like horrible period cramps and they lasted for about 4 days. They stopped for about a week and now I'm back to having them again since about 2 days ago. I also feel super bloated, like I can't suck my stomach in, tired all the time, headaches, and super moody! What could be wrong? Am I pregnant?