I went through a regular menopause (yeah, it hit me pretty early in life) before I transitioned. The worst symptoms took a couple of years to sort out. Among other things, my allergies went nuts, I had problems with balance if I stood up too quickly, and I experienced hot flashes and night sweats. It all started soon after I went off my antidepressants, so I was hit by the post-antidepressant depression, then menopausal depression, and then seasonal depression. I guess each one built on the other, so for a little while I was struggling with all three at once. Not fun.
But that meant that I didn't have any problems with such things when I started T, so that was a nice bonus. I imagine it's very awkward to have hot flashes when you're well aware that people are reading you as a guy!
All the trans guys I've talked to who had menopausal symptoms from T said that the unpleasantness didn't last long, maybe a month or two. So I hope you're feeling better soon.