Yep, It really depends on the person.
As i have said many times, i have been anxious since birth, huge esculation in my 20;s, but PEri , wow that was a whole new beast.
It didn;t linger for me, it really calmed down quite quickly, once on HRT, but there again i was also on the max dose of SSRI's and tricyclics as well. It wasn;t until i really upped my oestrogen and more significantly found the correct progesterone (OMG- the effects on my anxiety were HUGE) that stuff really calmed down.
I have now started reducing the SSRI's(first time in about 5 yrs) and off the tricyclics. Stertraline was never good for me, it made my anxiety far worse. It seems to be very 'fashionable' at the mo. It didn;t suit a mate of mone either. I have always needed the volume of my brain and thoughts trurned down and stert just made them louder
FOr my more 'stubborn' symptoms-night sweats it has taken about 3 months for that to start to stop ( if that makes sense)/
THe worst thing about peri anxiety is that you get asked 'what is it specifically that is bothereing you", my answer was always EVERYTHING. i coudl never find what i was actually worried about- CBT therefore was not worth it.