overnight I would feed DS lying down. his head was slightly elevated on cloth. I found that if I didn't move him after the feed he would often be ok and sleep without getting upset. if I tried to move him, it seemed to upset the tummy and it would take ages to settle him down.

I haven't heard anybody else say same thing, but maybe worth trying if you have asafe place to lie down to feed.

when feeding other times, I always tried to have his bottom lower than his head