I recently had an ovary removed as well and have not experienced any hormonal changes. Are you on pain medication? Night sweats could be explained by that. I wouldn't think that the removal of one ovary would cause this, and if it does, it should be temporary, assuming your other ovary is functional. Maybe since the other ovary had a cyst removed, it is not functioning? I would check with the doctor at your follow up.
Hi, I had a small cyst removed from one of my ovaries and the exact same thing happened to me. Within 5 days I had hot flashes. Post surgical ovarian failure, whilst uncommon, is a real risk with these surgeries and I was never advised of this risk before my op so I am very upset. I now have to take birth control, and all because of a benign cyst. I get migraines from the pill and I shouldn't be taking it either. I wish I had just left the cyst there. But given your history, I guess they do have to extra careful. Good luck, and I hope things get better for you.