Sex hurts!

So my husband and I have been together for 9years... I love him and I would do anything for him.. but here lately I’ve been having problems, with sex 😕 we always do the same position.. I ride... always. Don’t get me wrong I enjoy it. But the past few months it hurts.. my legs cramp and hips are sore! My inner legs... like were my leg meets my lady bits kills me! I can barely move when on top anymore. I’ve brought up trying new moves but nothing yet. We’ve been trying to have a baby too. Would maybe taking a joint supplement help? Has this happened to anyone else?