I'm so pleased your trip was worthwhile, but as Jules said, it's wrong that you should have to do that rather than have a quick referral from your GP.
I posted in Jules reflux thread (I think) about how debilitating and depressing I found the whole experience when Connor had it. Not only does the sickness and crying and lack of sleep get you down, but then when you venture out you feel embarrassed and a failure, even though it's something you have no control over. But hopefully all that will soon be a thing of the past for Grace and you
Btw, I had to give Connor's gaviscon before feeds not after. I found it really tricky, not the faff of preparing it, but I had to give it four times a day so wanted to give it to keep down decent sized feeds. It was so disappointing to give it then he'd come off the boob after about 1 minute, then typically within an hour he'd have a really good feed which he'd then bring back up