My husband experiencing intense foul smelling night sweats?

My husband is 32 and experiencing intense foul smelling night sweats. He wakes up drenched and freezing and the smell is pungent and sour – not like body odor.
He is also experiencing sexual performance issues and what he describes as less sensitivity and the inability to maintain an erection.
He has been on antidepressants for approximately 6 months and switched to Prozac approx. 3 months ago for anxiety and depression. He is under a significant amount of stress and our marriage has been on the rocks for some time as well. I’m assuming all of these are linked, as he is an otherwise healthy, young guy. He had a vasectomy 3 months ago as well, but I’m not sure if that is relevant.
The night sweats concern me because they seem to be getting worse and nothing seems to help whatsoever. The smell is terrible and really makes me worry something is wrong. I’m worried about him and just want to help. Any advice is appreciated.