Is something wrong with me?!?

So my bf & I have been together for about 4mths. The sex has always been amazing. In the beginning I would have MULTIPLE orgasms. But for about the last month it's been harder & harder to have one. To the point that I cant have one at all. Everything else still feels amazing but I just can't get there. We've tried different positions & using toys but nothing. I don't know if its from depression, medicines, or if Im focusing so much on it that I can't get outta my head, or if Im somehow losing sensation down there, or what's going on?!? The worst part is he's starting to get really bothered by it. He thinks its something to do with him not being able to pleasure me. But it honestly isn't & Im afraid Im going to lose him if I don't figure out wtf is wrong me!!! Any advice would be greatly appreciated!!