Silent reflux

My daughter is 10weeks old and suffers with silent reflux. So far we are doing all that doc recommended

Keeping her say up right during feeding & for 30 mins after feeding. I put her in her swing chair for naps during the day and have her crib elevated at night. Burping her during feeding etc. Anyway she was prescribed Colief and this did not work just gave her awful diarrhoea so we stopped it. She has been on infant Gaviscon now for over a week, first 3 days it seemed to be helping and she was more comfortable in her sleep at night no thrashing arms & legs everywhere or arching her back & making loud grunting noises, was beginning to think we had finally found something that helps. But nope! We are back to square one and all her symptoms are back but worse. Plus now she is constipated, she is also not happy with Just 4oz per feed (one sachet per 4oz) she Normal I had 5oz.

I’m thinking of trying anti reflux formula but I’m worried this will still bung her up with constipation. Can anyone here that Babies been on AR formula tell me how it was for your baby ?

Someone mentioned trying comfort formula instead , can this help ? I know it will be better on her digestive system as comfort is also for constipation but is it thick enough to help with silent reflux. Sorry for the long post.