Please have a look at the Happy Cosleeper and Cosleepy on Instagram.They are great for evidence based advice and support on safe cosleeping and 'breast sleeping', where can learn to feed overnight with minimal disruption to you and baby. There are hormones in breastmilk that help get both baby and you back to sleep. Another reason why setting up your bed to bed share is really important as those might feeds can be exhausting and it's safer to ensure if you fall asleep you are doing so as safely as possible.
Like you, I was extremely anxious to do it with my first, but slowly started doing it by practising during day time naps, and getting my partner to check on us, as he was a v wakeful baby.
with my second I did it straight away, by making sure our bed was set up safely and also doing reading on 'chest sleeping', which got us the most sleep during those early days.
i know others hsve already said but is safer to set up your bed for cosleeping, even if you think you'll never do it and this is the advice NHS share now. In fact is was our health visitor who first suggested bed sharing with my first.
the lullaby trust also have the safe sleep guidance for cosleeping/ bed sharing online.
if you're concerned it is reflux causing the wakes please access breastfeeding support. Do you have breastfeeding support in your local area? in my area we have a great team of peer supporters who work alongside professionals to support people. It can often be something as simple as the latch needing tweaking which can make all the difference.