My 9 week old used to cry/scream a lot during the evenings and maybe have one bad day a week where he would scream all day. This has turned into screaming constantly like he's in pain. The health visitor and doctor think it's silent reflux but he hasn't got a drs appointment until Wednesday. The doctor has told me to use anti reflux thickened formula. I was just hoping someone else here had used it and how long it took to see results, if any.