Seroquel is what he suggested.
I just don't have a lot of faith in him. When I told him Celexa works for me but it needed to be increased, he switched my meds and I ended up worse. Then he put me on Lexapro even though I'd never had problems with Celexa. I asked to go back on Celexa because it works as well and it's cheaper. He insists Celexa is a worthless drug. I and my therapist disagree. I'm doing better now than I ever have, minus the sleep difficulties.
So if he's wrong about the Celexa, maybe he's wrong about melatonin and valerian and everything else I suggest trying.