4 month old baby with reflux

Hi

My 4 month old baby boy is suffering from reflux. Up to now I have given him Infant Gaviscon prescribed by the doctor. Although this helps a little bit it makes him extremely constipated. I have spoken to a homeopath that gave him Chamomilla 200. I am suppose to give this before every bottle (I recently went from breastmilk to SMA Gold formula) I've now given it to him for 3 days but the reflux seem to be getting worse. He is also very cranky and cries a lot more than usual. He recently started sleeping through the night but for the last two nights he woke up at 4am and keep moaning (not really crying) until 6am when he will falls asleep again for another hour or two. He has also lost his appetite.

When doing a quick search on the internet I notice a lot of people mention Chamomilla 30 - not 200. Can someone please explain the difference and why the homeopath would have given 200 and not 30? Also, I found one article that suggested that Chamomilla 200 should only be used once, not before every feed?

It is also worth mentioning that he has a mild cold at the moment. Although when he had a really bad cold previously he still fed really well and seemed much happier.

Please excuse my ignorance on the subject. I am new to homeopathy and would very much like to find the right remedy instead of going back to conventional medicine.

Thanks
A_mum