My baby is six weeks old and until one week ago was doing great drinking her milk. We were on 4oz of formula given every 4 hours, and that seemed to suit her really well. Now, she is refusing the bottle and finishing between 1 - 3 oz. For most of the week I tried to keep to the same routine - a feed every four hours, but of course she's getting hungry earlier and not sleeping, so now she is overtired, her routine is all over the place so we both don't know where we are and she still isn't feeding right.
Basically she'll eat in one go until she fusses, which used to signify a burp break. Once that's done (sometimes a burp, sometimes none) she hates to return to the bottle - she'll kick out the teat, cry if I hold it, spit out milk and stop sucking. It takes over an hour to even take a few oz where it used to take 20 mins max. We've tried changing the teat to stage 2, which means she drinks faster but no more than before and we've tried feeding on demand, which now means i never know if she's hungry or tired. Does anyone have any ideas? I'm so scared she's starving and am especially paranoid because I had problems breastfeeding and already feel like i've failed her in that way. I just don't understand this sudden change - help!