Hi Lighthouse
I'm sorry you're having such a miserable time. Like you I have endometriosis as well as SjS, but as they're both AIs it's difficult to ascribe symptoms to one or the other sometimes. I haven't had hormone treatment for endo, but I'm 48 so I'm having a few perimenopausal symptoms. My first hot flush was very different to the cold sweats I get from SjS autonomic neuropathy, but sometimes the general 'odd' sweats could be either. With AIs our body temperatures aren't always a reliable indicator either so you're really left without too many clear indicators!
In a way it doesn't matter whether the hot flushes and cold sweats are caused by the artificially induced menopause or by a SjS flare because all you can do is cope with the symptoms - keep showering, changing your clothes and bed linen, eating light meals and drinking plenty of fluids.
Hope you're feeling better soon.
Take care - Chickpea