C.C.
My daughter had the exact same thing. Thank goodness I had a really old-fashioned doctor. He told me her problem was the hole in the nipple was too big and she was getting too much air/formula faster than she should. I got 'unpunched' nipples and took a sewing needle #2 and put a hole in the nipple. He also said to put her in her infant seat and give her the bottle 'sitting up' .... in the 2 o'clock position - almost upright. He said this would keep her 'straightened out'. When I tried to 'hold' her 'sitting up', she was all bunched up. He said her diaphram was 'crunched' ... I started immediately and we never had that problem again.
I missed holding her, but got to do a lot of that anyway!
I understand about being hesitant to give her drugs at that age! I think doctors are too willing to give drugs!
Good luck.