So I had sex about 2 and a half weeks ago and my boyfriend bought me plan B before he left to his work station so I took it about 48 hours later. I got my period on the day o always get it which is the 10th. It was regular. My bleeding was normal. I finished within 5 days and 2 days later I started experiencing really bad cramping for almost the whole day and it's been this way for almost 5 whole days already and I'm beginning to get worried. Am I pregnant or could it be the plan B messing me up?