Non-Estrogen options?

My mom has a genetic blood clotting mutation (I forget the name but I'd know it if I saw it) that causes her blood to clot very easily, and because of that she can't anything containing estrogen. This has caused her to lose her leg (Not from taking estrogen- it causes blood to clot easier in general, estrogen is just one of the things to make it worse)... I am getting tested for it soon but in the mean time I was thinking about starting birth control and was wondering what my options were, besides pill, that would work if I were to have the mutation?