Decidual cast

So I started a new medicine and it’s side effects are really intense. What I didn’t know is just HOW intense they are. I got the birth control shot to stop my period for 3-5 months. Well after I started taking a new medication for my headaches it completely overrode that shot and about a week later I got a period. The worst part is day 2 of the period I shed my entire lining. Like one big blob. Can you imagine how TERRIFYING that is.