Hi Rachel
I'm no B-F expert, as gave up after 6 weeks, but reading your post is exactly how it was with my DS. He fed constantly, and I could not ever take him off my breast without him crying for more. Although he put on an enormous amount of weight in the first few weeks, I now realise that he could not have been feeding for 24 hours a day! He also fell asleep and would need constant tickling of feet etc to keep him awake.
I spoke to many lactation consultants over the phone, in an attempt to sort out what was going on, as was very reluctant to give up (always wanted to totally BF my baby!). I was given much different advice, and tried everything!
I now wish that I had paid for a one-to-one lactation consultation, and would advise that if you want to continue to BF, but feel that it is not going well, maybe seek their help on a 1-to-1 basis, before you switch over to formula. Phone advice was very helpful, but without an actual observation it is very hard for anyone to see what is going on.
Good Luck!
Lou