is this reflux? baby won't settle on her back

[LynsF82]

I hope someone can offer a bit of advice on this as I'm just about at my wits end with lack of sleep. My 4 week old daughter has been bottle fed from 2 weeks old and has been very gassy (mostly farting, burps have been difficult to get out of her!). We tried infacol but that seemed to make it worse, so have taken her off it now.
I'm taking breaks during feeding to burp her, and keeping her upright for at least half an hour after feeding (usually longer though), and she goes to sleep on me just fine no signs of discomfort at all. But then when I put her down in her Moses basket after a couple of minutes she squirms around, makes faces and noises like she's in pain and pulls her legs up. She doesn't often bring up milk, but I worry about silent reflux which I've heard of but not sure if this fits. I have been doing various burping positions and baby massage, we have swapped from Tommee Tippee closer to nature bottles to the doc Browns anti colic ones, but so far no change.
I hate to think she's in pain and can't sleep properly, I've tried leaving her to settle but end up picking her up to sleep on me quite often, so of course I'm not sleeping much either!
Has anyone got any tips for me before I go insane please? Thanks!

[Timetogrowup2016]

My dd Is similar.
Will she sleep in a bouncer/car seat? It's not recommended but if I didn't let her for a few hours at night I would fall asleep holding her which is even more dangerous.
Also do you swaddle ?

[frangipani13]

Could you prop the mattress up slightly so her head is is not elevated? It does sound like reflux and this what of the main suggestions

[LynsF82]

Thanks for the replies, she sometimes likes to sleep in a bouncy chair but never more than a few minutes. I've propped the Moses basket up now and also changed bottles again as the doctor Brown ones were causing more problems than they were fixing! We have used the Avent Classic + for a couple of days along with gripe water and she seems much better, in fact today I'm worrying she's been sleeping for too much!! Of course this won't last I'm sure....

[frangipani13]

Advice is also to burp often during during feed - My LO refused the bottle once it had been taken out so we couldn't do it