Hello, i know this is an old post so you may not get this, but i read your initial post and i could have written it myself.
I am 46, also had CBT and on sertraline but have had crippling anxiety since i was 40 (nothing before that at all).
Felt amazing mentally whilst i was pregnant with my son at 41.
I could swear its caused by hormones but i've never had any Dr do anything other than dole out AD's.
Anyway just wanted to say hi and let you know i'm in the same (rocky) boat!