Having trouble trying to wind 4 week old after night feeds

[ER1992]

My 4 week old has no problem with being winded during the day and always settles once hes had a bottle and brings any wind up pretty quickly. But im struggling with the night feeds. He never seems to bring any wind up after a feed and I'll try keep him upright, patting/rubbing his back after he's finished the bottle for about 15 mins after he's finished. As soon as i lay him back down he starts grunting and groaning like he's in pain, sounds congested and like he's struggling to breathe, he then usually ends up being sick. I'll get him up again to and try wind him again but once he's upright nothing comes up. This can go on and on for about an hour before he settles again. Is there anything I could be doing wrong or anything I can do to help him bring the wind up?

I'm watching with interest as I'm having the same issue with my 4 week old.

A breastfeeding support worker at a clinic I attended yesterday recommended Infacol, plus trying to keep him upright for a while after feeds.
Some other mothers recommended raising one end of the mattress (feet at the lowest point) by placing books under the noses basket stand or a wedge under the mattress.

We have been giving infacol which works for the 1st feed before we put him down to bed as he goes down straight away with no problems but it doesn't seem to have the same effect when he wakes for next feed. I may give the anti colic bottles a try