Sorry to hear about your LO, OP. My DD is a reflux baby, though she was worst affected at 3-9 weeks and is now improving a little bit at 15 weeks. It's very, very hard. I'm enjoying motherhood but am seriously exhausted. Here are a few things which have helped:
Carrying her in a mei tai sling or moby wrap so she's upright most of the day. She also naps in sling so that helps to settle her.
Medication - Domperidone and Ranitedine. Over the counter stuff was completely ineffective in her case. Except for Gripe Water - that helps a bit sometimes.
Reflux wedge underneath cot sheet and sleep positioner to keep her on her side. Left side is best for digestive stuff. I was initially paranoid about this, but she's never been able to settle on her back - wakes instantly or within 30 minutes tops. I use a breathing monitor, but you may be more relaxed than this. Cot is a co-sleeper one as she wakes so much in the night I need to have her close by.
Eliminating dairy from diet if bf or using a hypoallergenic formula is ff.
Lots of touch and cuddles, skin to skin, warm baths, baby massage.
Help and support wherever you can get it! I have no family about but DH is great and I'd never be able to do it without him.
Mostly, I think they just have to outgrow it. DD's Dr said they often do as they get older, sit upright more, walk. Gravity helps apparently and the gut sometimes just needs time to mature.
Take care and hang in there!