Morning After Pill : Plan B

I took the pills in the Plan B packet a little over a month ago. Me and by boyfriend are in a serious committed relationship and we had a drunken night and the pills were only a precaution. Since then I have felt a little achy(similar pains to cramps), and didnt recieve till 1-2 weeks after it was suppost to come. When It came It was a heavier flow than normal. I have started vomiting pretty much everything I try to eat, and earlier I vomited and there was some blood present. Im a little worried and would love some help form anyone who would know a little about this subject. Thanks.