Hi, I am on unwanted 21 birth control pills. I started it 3 days back along with my menstrual cycle. But i am getting side effects like stomach pain, severe exhaustion, diarrhea at times, weakness in body and nausea. Is it normal or should i stop taking it. This is the first time i am taking birth control. I am married for 2 years now. I never had any of this issues when i was not taking birth control. Please help. Just wanted to mention i took an emergency contraceptive pill 2 weeks prior to this and as a result i am having heavy periods this time. Wondering whether both of this is bad thing to be taken together.