Smoking can DEFINITELY affect periods, and the flow of the period as well. In Chinese medicine, anything that is hot and drying (i.e., anything that is smoke and produces heat, etc) can be very injurious to the 'yin' fluids of the body--in this case, blood is considered a yin fluid in the body. read more
Smoking weed should not affect your menstrual cycle, but it can make you less fertile. I advise you to not do it again for health reasons. Sure, no one has died from it, but weed is only a launch-pad drug to harder ones. read more