Orgasm

Hey guys! So me and my husband have been sexually active together for about 5 years now. For about the first year I was always able to cum when we had sex. But after that, I couldn’t finish while having sex. Finally we bought a vibrator and use it while having sex and it works. However, I really want to finish by just having sex with him. It makes me feel horrible because it has nothing to do with him as to why I don’t finish. I really don’t understand why I stopped being able to with just him. I was wondering if you guys knew anything I could do that would get me back to that point. I also found this drug that helps with sex drive and was wondering if any of you have tried it and what you thought about it. It’s called Addyi and I’ll attach a pic also. Thank you!!!