please help im about to lose it

My daughter is 3 weeks 5 days old, she drinks Costco formula (kirkland brand), from Dr. browns bottles. She is fine all day long, she naps and eats and is happy when she is awake. However, at night about 1 hour after her bottle she is up grunting, pushing, squirming, crying and sometimes screaming. She settles down when i pick her up but will start again shortly after i put her down. I will add she does NOT burp for us, day or night, i try for at least 30 minutes at night and get nothing, and i know im doing it correctly so thats not the issue. She has always been difficult to burp since birth, but it doesnt seem to bother her during the day. I dont think shes constipated as she has at least one bowel movement per day, and she typically doesnt spit up, when she does its just a little. I have talked to her pediatrician who suggested sensitive formula, but that didnt make a difference. I have gripe water and gas drops, and notice no change with those. I feel like i am going to seriously lose my mind if i dont get a little sleep at night, she eats every 3 hours, but it takes her almost an hour to eat and try to burp, then shes up an hour after eating so im lucky if i get an hour at a time. I have also tried massaging her stomach and bicycling her legs. Please any advice before i go insane. Thanks!