Any answers?

I’ve been on birth control for more than 9 months now. (The depo shot) when I got on birth control my sex drive went down. When I first lost my virginity it didn’t hurt and the first couple of times it didn’t hurt. Now when I have sex it feels like my body rejects it, it hurts putting it in and then stops during and then hurts after. I’ve tried lube and condoms nothing helps. Why does it still hurt after a year of being active with the same person???