I had a superficial blood clot in my leg about 25 years ago, which resulted in my immediately being taken off birth control. About 4 years ago, I got the Mirena, which has been fabulous. I was worried about the hormones, at first, but I've had no ill-effects, maybe because it works with progesterone and not estrogen.

Due to recent bouts of heavy and erratic bleeding, I had the Mirena removed recently. During the heat of the moment, I wasn't thinking clearly and now I'm worried I could wind up pregnant. Since Plan B uses levonorgestrel (from the progesterone family), I'm wondering if it would be safe to use it given my medical history... Anyone else with a similar experience?