The presence of hot flashes (although rare) with all your other symptoms clearly point towards menopause
As you have also mentioned a drop in libido, my best advise would be to initiate prescription hormonal
supplements along with estrogen
creams (for local application).
Very rarely women around menopause suffer with sleep disorders, but I do not think your sleeping trouble will subside with the hormonal supplements. For this you might have to visit your doctor, to find the exact cause for your sleeplessness
(the most common cause has found to be anxiety and stress).
Hope this helps.