Good morning, I curently take Vyvanse 70mg. I am throwing this out here because it s the only thing I can think of that may be a factor in what I experience. When I have my period, I have this horrible pain in my stomach , this lasts for about 30-45 mins. It takes my breath away and I get very sick to my stomach. I have no idea what this is, and this only happens when I have my period! Its frustrating and very paihnful! Please help me!