Thanks all.
I was uncertain as when me and DH brought her home she was going 3-4 hours but this stopped being thr case two and a half weeks later. I was combination feeding as midwives at hospital said she was very hungry and needed filling up. I have had to switch to formula as I am now on medication for remitting relapsing MS and it is harmful to DD.
Before I switched to formula fully she was very unsettled. This has continued over the last few weeks and never goes without spitting up - sometimes she projectile vomits and coughs during and after feeds. She will also be unsettled crying for hours without anything working to comfort her. HV thought colic but I have a hunch it is reflux but the crying doesn't always happen and she doesn't appear to be losing weight.