Thanks again ladies. Thanks for the info about silent reflux - I will keep that in mind.

Last night I noticed that sometimes when she cried, it was followed by a burp or fart, so it seems wind is definitely not out of the question. I think it is either teething, or something is upsetting her whole digestive system. I do have a forceful letdown / fast flow. I used to posture feed when she was younger, but then I thought she got to a stage where she could handle it better without posture feeding. Now I am going to try posture feeding again. I posture fed this morning and she let out 2 massive farts and a massive poo while feeding - actually she pooed 3 times in 2 hours this morning. So much poo - no wonder her bottom is sore.

I really wish I could take her to a doctor who would be supportive and take it more seriously. I have been 3 times in the last 2 weeks to medical professionals and they have been rather dismissive of me. Grrh!!