Early Days on Letrozole

I don't know what's normal but during last year when I was going through the final stages of menopause (it became official in January 2018), I got shocking night sweats for months and then they just stopped.  My joints did get worse, not so much on waking up, but if I'd been sitting for too long.  And really bad headaches - not migraines, but they just wouldn't go away for days and only responded to panadeine.  Joint pain isn't as bad now just what I can put down to early arthritis and old injuries.  The headaches ramped up again during chemo and I got my first hot flushes, apparently due to the last of the oestrogen being shut down.  Now on Letrozole, the flushes are still happening but fairly mild.