TMI but I need help

This whole thing is sooooo hard. My husband has delayed ejaculation and a low count. Which basically means he is unable to finish during intercourse. He has to manually finish and try to get what he can inside of me. 8 months later no such luck. Sex has become such a source of negative emotions. Now not only can he not finish he can not even maintain during intercourse. I know rationally it is not because of me, but I can't help but feel unattractive :-(. I feel like a failure as a wife. We have become more like roommates than lovers. We both know sex will end badly so we are avoiding and then the pressure is on for fertile week. I do not know what else to do.