My girl has just started taking clen. She's done with her first 2 weeks and shes now in the middle of her 2 weeks off. She had very little side effects, some cramping and small headaches. She has gone up to 5 (20mcg) a day and has felt fine. But now she's late with her period? Im currently taking over 750mg of test a week and i know thats not fool proof birth control and that she might just be pregent, but has anyone ever heard of clen messing with a womans menstral cycle? She's freaking out about it and is making me very uneasy about the whole situation. Not that she might be pregent but if she is, will the clen and all the test i was taking have an effect on our soon to be child? help...