its posted everywhere that prescriiption birth control can take away the sex drive, i would say it is the cause of your problems and it may get worse when you have it removed but it has to come out, so you might as well get it over with.
or you could wait a little longer til your husband wants you to be normal again, lots of women here will never take birth control again so their husband had to get a vasectomy. there have been many women in here with no kids at all, the rules about iuds have changed.
maybe if you get it removed you may need to boost your immune system with vitamins and you could get your hormones checked before removal. the only lady that didn't say she had a hard time started exercising right after removal and vitamins and acupuncture or massages or something like that.