Ok. So I got my period last month (October) From the 10th-15th... And was spotting the 16-18. On the 19th, I had sex, and we wore a condom. I also started smoking cigarettes again, and I started smoking weed again during this month. On my period tracker it said I was supposed to get my period on the 7th (today) and I still have yet to get it. I took a pregnancy test yesterday, and it came back negative. I'm positive that me stressing out about this doesn't help at all either. And I lost my virginity at the end of July. (I'm 22 years old, so no one needs to freak out that i'm 16yrs. old) I heard that weed can affect your period, also if you have sex, and if you don't have it often it can throw your body off, and I know the obvious factor that stress can play a HUGE roll. I think I'm just being a dumb girl and stressing out over nothing, but it would be nice to have some sort of reassurance? HELP :-(