My husband is a newly practicing OB/GYN. When we talked to my doctor about birth control after our son was born two years ago, my hubby suggested the Mirena. I'm so glad we went that route. I took the pill for several years before I got pregnant and had the usual side effects at the beginning (nausea, spotting, etc). It worked for me, but it didn't take long for the effects of the pill to wear off after I stopped it to get pregnant! In fact, I was pregnant pretty much within a month of stopping contraception, which means if I had ever forgotten the pill, we could have had an "oops" pregnancy. My hubby thought Mirena was a good contraceptive choice and thought I was a good candidate for it. My doctor agreed and, though I had some cramping with insertion, I haven't had any other side effects since, and not a single period, either. I think I would have forgotten the pill each morning if I had stuck with it because I was so forgetful as a new mommy at first. Remember that no form of contraception except abstinence is 100% effective. There is always the risk of pregnancy with each one. If you have a lot of concern about your particular situation, maybe you should speak to your doctor about it. Good luck!