I'm confused as to why the doctor would prescribe medications for reflux when he ruled it out with the ultrasound?
What are you doing to help baby with what might be your overactive let-down? I posted to you in another thread and my suggestions were to pump your breasts until your milk let's down and then put baby to breast to see if that makes any difference.
Otherwise, it really doesn't sound like your baby is crying all that much...am I missing some information? Have you considered that perhaps your baby is just sensitive to the world outside the womb? Did the links I gave you above help you out at all?