You don't say how old you are, but when you reach menopause or even periomenopause, as the hormones drop, in addition to hot flashes which some women experience and others don't, you can also experience panic attacks and anxiety as well as the inability to sleep -- it's all hormone related. I am on biodentical hormones and now feel like a normal human being -- the hot flashes for me every half hour with heart palpitations (which is another symptom) were unbearable as well as debilitating, and I didn't know how much my heart could take as well as the constant heat.
My sister-in-law experienced panic attacks and anxiety when she went through menopause and had to take a medication to combat that until she got the other side of menopause -- stopped it and she is fine now although she still has sleep problems -- waking up several times in the night and gets up real early in the morning. She hasn't taken any hormones. As I said, for me I am 60 and still take the biodenticals and it has helped me so tremendously. Vertigo is another thing that can happen in menopause -- no one tells women how much estrogen and testosterone affect so many parts of us in addition to the sex parts. It has been quite a journey and learning experience -- so many women suffer in silence although more has come out about it than in the past. Suzanne Somers book "The Sexy Years" and her later book have helped with information and go on Oprah www.oprah.com and plug in menopause in search -- she has a LOT of information there about it -- a year ago she had several shows concerning menopause.
The only thing is that my insurance doesn't cover biodenticals because they made with natural plants such as soy and yam (especially ground by a pharmacist) so once I year I pay out of pocket to see a physician's assistant who prescribes them for me and pay out of pocket to buy them from the compounding pharmacy I get them from but for me (and my husband) it's well worth it.
Good luck -- the right answer is out there for you.