I have been on different doses of vyvanse, currently 20/20. A day, for almost 3 years, my periods have been screwed up for well over a year, lighter and lighter till nothing at all, I'm 48. Thought it was menopause, I stopped taking it six days ago due to a shoulder arthroscopy, three days off it, I started bleeding like a regular period for the first time in nearly a year and a half or more, I will not take it again for at least a month to see if I have another period, or if truly is menopause, any ideas???