Hi everyone! I'm 20 years old and starting back in February I started experiencing some strange changes in my menstrual cycle (more painful cramps, heavier periods one month, lighter periods another month, etc.). My last period was May 26 and I was due for my period yesterday. I've had cramping on and off the past few days and today I got my period but its lighter, the flow is more gradual, and its more brownish than usual. I'm not on any birth control and the last time I had sex was May 2 (my boyfriend wore a condom and made sure to pull out). I don't think I'm pregnant because I had a period since then (although it was lighter, I still had severe cramps). Does anyone have any input on this? I didn't start to have sex regularly until December so could that have something to do with it?

Also, back in March, I had a bad experience after smoking a large amount of marijuana with a friend and was due for my period right after that. It was this period when my cramps started getting worse and just very bizarre periods. I understand marijuana can have an effect on menstruation so does anyone know if this could be the reason why?