One of my girls was having the same problem. She thought that it was the birth control so I suggested that she switch. She all of the sudden bounced back into her old self. You dont always have to go completely off of the pill to change your sex drive. Ask your doc to switch it up, some will change hormone production which will make a difference.
Your gonna laugh...but I am a psych major earning my masters and soon phd it is actually psychological, that is unless you are not at all interested and not attracted to your Fi which obviously isnt the prob.
Some people think psych is fake, but seriously try to telling yourself you are horny and then think about how attractive your Fi is.....Honestly this should help and dont be afraid to switch the contraceptive.. Let me know if this helps at all. Also switch up everything, change foreplay etc.