Have you checked her temperature? Definitely sounds as though something is up. Is she still having wet nappies? Keep a close eye on how many wet nappies she has, and check that her fontanelle isn't sunken. If in doubt get her seen- young babies can get dehydrated quickly, and IME hcps are always very happy to check with little ones.
She fed at 2am, small feed 4am, midday, 2 and is refusing now. She screams when I offer the breast but seems to have a hungry cry. I offered the second she woke from her nap. She seems well in herself and up til now fed every 2-3 hours during the day with 1 or 2 night feeds between 8pm and 6am. I haven't used a bottle yet but that too was refused in the nightmare morning we had. She hasn't slept a great deal today but the last nap was about an hour. I'm currently rocking her whilst DD1 watches cbeebies.
This is stressful. DP home in an hour. I can't wait.