the first question is was the citalopram working for reducing your anxiety? keep in mind that sometimes all antidepressant meds can work for a while then stop, or simply never work for a person at any dose at all.
If it was, then, IMO, doc was very wrong in changing it as there is no guarnatee the zoloft, although a similar med, will work at all. I hope doc doesnt get triple frequent flyer points for every zoloft prescription he writes
amitryptaline isnt usually prescribed as a sleeping pill but in that small amount, is unlikely to cause problems
I am very doubtful of your new doc