Did he just get worse & worse?
When I looked back I kind of realised that a lot of his crying had been due to the silent reflux at the time had no idea. Yes it did gradually get worse but also there are so many things going on with babies that I found it hard to tell what's what. I found BW forums when he was about 4 months old, he was going through the 4 month regression, from 3.5 months...but it's almost impossible to know how much of that "regression" was pain and inability to stay asleep because he was refluxing lying down and how much of it was normal developmental sleep issues. He had been self settling since about 8 wks old so it wasn't like he didn't know how to sleep, he did.
The information and lovely ladies here helped me to recognise the signs and encouraged me to seek professional medical advice, and when I was told he didn't have reflux the ladies here encouraged me to go back to the docs again. When it became worse he was spitting up milk hours after a feed when I lay him down to change his nappy, up until then there had been no spit up, that's how silent reflux is, symptoms but not obvious ones that I'd think of, he didn't bring up an entire feed for instance.
The difference when he was diagnosed and medicated was amazing.
There have been other illnesses which are on the reflux symptoms list and honestly I have no idea if my DS had those because he had reflux or if they were all separate, ear infections, wheezing, asthma.
I tried to drop the meds once when he wasn't ready. Tried again at 24 months which worked out pretty well. But even since then the symptoms returned (and again I got help from the ladies here). He is 6 years old now and every few months or so we realise he is struggling even if he doesn't tell us, hiccups, wheeziness (he no longer uses an inhaler daily as we dropped that too, he only uses a couple of times per year now), disturbed sleep, we can hear him refluxing but he doesn't vomit. We start his meds again and continue for a few weeks then drop them again. This seems to be working for now and I hope the time between gets longer.
Now, I'm not saying your LO has reflux or silent reflux...I'm just saying there are a few things that are making me think and it's worth keeping an open mind on it. I'm certainly not a great source of info on the subject, I rely on others in the community to help me! But those of us who have been through it are perhaps a bit more alert to the possibility. I only have one child and when I had him I had no clue whatsoever about babies or reflux, I wish I'd known more and sooner as I could have saved him the pain and saved myself the heartache and hard work of coping with a refluxer who wasn't medicated.