Contraception methods like the pill, NuvaRing, arm implant, or hormonal IUD all interact differently with every body, and if you notice a pretty clear loss of interest in sex ever since you started yours, it could be the problem. It sucks — the very thing you go on to have more uninhibited sex can be the reason you don't want it at all.
Try: Waiting it out for a few months if you just started — it takes the body time to adjust. But if it's been so long since you've even found the idea of sex appealing in any way, consider switching to a different brand or method or a nonhormonal option like the copper IUD.