If I want to boost my sex drive, I try a course of ginseng and/or muira puama. They really do work (for me). The MP is particularly good, it really not only raises my sex drive, but also makes my orgasms way way more intense. Give it a go. Hormonal birth control destroyed my sex drive too, but once I was off it I was fine again.
I do hope you find something that works for you. Let us know how you get on.