Ursula- i think there is a thread here on BB about Reflux and colic and prob can get some good tips from other mums who have been through it. we went through all sorts of things with Nixon and i think its just finding what works for each baby. He end up getting pescription for Zantac which helped the pain assoc with it, nothing much actually stops the spewing unfortunatley and if baby keeps putting on weight everyone will keep saying its all ok! (easy for them to say when they dont have a baby that spews half their feed back up every time!)
we end up taking the wheels off the bassinett and proping it up with yellow pages!
also when changing her nappy yoou could try to turn her on her side rather then lift her legs up cause that squishes her belly and may cause more vomit.
keeping upright for a while after each feed and Nix used to hate tummy time but like chest time so we'd do that as his tummy time.
with Nix once we got the pain away he was a much happier baby and we just had to deal with the constant spewing, he didnt get much better until he could sit up and be upright more of the time.
I hope you find something that works for Maddy, maybe a trip to your gp or a paed if you have one would be good also.