I got my period on may 18 and it need on the 24th then I had unprotected sex's on the 26 and took plan b that same day as soon as possible. Know today may 31st I woke up and I had blood in my underwear I cleaned up and it's not like my regular period b/c usually I have alot of cramps to the point I end up in the hospital I have No cramps just bleeding. My concern is this bleeding due to plan b or am I pregnant?