I was on the lowest dose of estrogen available, and still had fearsome migraines. Unfortunately for me, when I was on the pill for 5 years, I always got headaches, each month getting worse and worse, to the point of ending up in the ER. After that I stopped taking them, but the damage was done, 2 months (1975)after I stopped, I had a stroke, directly atributed to the pill. Fast forward to 2001, I had a hysterectomy, and went back on estogen for HRT. The headaches began within a year, and again got to the point of being so bad that I was totally out of it. This time I learned my lesson. The day I stopped taking them, I felt like a weight was lifted from me. Of course I was taking them to relieve menopause symptoms, not for BCP, but if you don't tolerate them, let your doctor know, no matter what.