Combination Pill

I started taking the pill on August 11th and have been bleeding and dealing with me period since then, nearly 2 weeks. I know this is normal because the body is adjusting to new hormones, but my period is wrecking havoc on my digestive system. This is a normal occurrence during my period but seeing as its prolonged i am not having that great of a time. Having digestive issues is my biggest anxiety trigger so while i am trying im not doing as well as i would like with coping. Anyone have any advice?