The pill and side effects?

Audrey

So I've recently just started taking the pill. I'm on a low-estrogen and it's a combination pill. I take it around 10 pm each night. Recently after I've taken the pill it makes me feel nauseous and get a slight headache. Today I started experiencing really bad cramps that would last anywhere from 5-30 minutes....they would happen out of no where. Should I be concerned?....or have any of you experienced it?