Help! For the women that have taken clomid

So I started my first round of clomid and I took my first pill last night on cycle day 5. It was suppose to be my last day of my menstrual cycle and now I woke up with super bad cramps and I’m heavy as if it were my first day all over again. My doctors office is closed until Monday so obviously I can’t call her to ask if this is normal. Is this suppose to happen?! My cramps are never this bad. Are these two related?!