I found a lot of my side effects of chemo were actually from Menopause. The itchy thing I suspect may be from the chemo though so you may need an antihistamine. Be careful of how much you take as for me, it brings on menopause palpitations.
As to the hot/cold, I lived a few years with coat on coat off and slept under aircon with covers on covers off even through Winter. It gets less often and less intense as time goes by. Initially though, it was tough to take and my anxiety levels would go through the roof especially if the sweats started in public company.I found joining a Menopause group on Facebook especially helpful as there are loads of meno side effects which I didn't know of but by gee, I think I have had them all! It does get better with time.