I have been on the pill for about 3 years. Back in June I had to start taking Topamax for migraines. The doctor stated that Topamax decreases the effect of most birth controls and to ask my doctor which birth control I could take that would have the most effect. My OB/GYN suggested an IUD, I'm just wondering because I read some side effects are migraines and weight gain and pelvic inflammatory disease so I'm wondering if this is the best route. If the IUD is going to cause migraines I don't want to take it what do you all think?