When should I call my doctor if I am taking Heather?

If you're taking the birth control pill Heather (norethindrone), call your doctor if you find out you're pregnant, you get off schedule with your pill routine and aren't sure what to do or if you experience sudden or severe pain in your lower abdomen or stomach area, a symptom of ectopic (outside the uterus) pregnancy. You should also call your doctor if your periods become very irregular or you have a lot of spotting between periods or if you develop headaches, breast tenderness, nausea or dizziness that becomes severe.