You are doing a great job!
Ok so for the dummy, my daughter took it no problem but my son needed it but wouldn't take it at first. I had to put it in his mouth and keep tapping on it to stop him spitting it out. I did that a few minutes at a time and one day it just clicked and he latched onto it. I've only just taken it away at 2.5 years.
My daughter (both kids were reflux) did the dummy to bottle swap every bedtime. Dummy for a minute, scream, bottle for a few minutes, scream... repeat until she passed out.
My son needed to be cuddled, and then put down for a couple of minutes, then when I picked him up again he would pass out. No rocking or walking or patting worked for him. He HATED carriers/slings of any kind.
He wanted cuddles but needed space to get ready to sleep.
Medication wise - lactose free formula and gaviscon helped us. Ranitidine didn't help us much.
Fingers crossed you figure out the right combination for your little one.
And not all babies need to be rocked and bounced to sleep - they are all different