Does taking Clomid change to dynamic of my menstrual cycle? Last month, I took my first round and I start my second round today but this month's period was horrific. I started a week late, I had horrible cramps and bled very heavily. These symptoms were only for the first two days of my period but I haven't hurt so bad and been so sick since high school! I start 100 mgs of Clomid today and I am scared to see what my next period will be. Do I need to make an appointment to see my dr or is this common for women taking Clomid??