I'm an 18 year old female and for the past 2ish weeks I've been experiencing period-like cramps, but no period. There is no chance I could be pregnant. I'm worried because I was supposed to get my period about 4 days ago.

I've also been experiencing slight constipation and gas. I've been drinking every weekend so I was wondering if that could have anything to do with it. I usually only drink beer (around 6 beers on average) one day every weekend.

I'm really scared because this has never happened to me before!!

I've been smoking a little bit too.