Amy, I know you said that you have aircon on but do you have Bethany dressed and swaddled? If so she is probably just too hot, which is why she isn't feeding as well as usual. Try to wake her if you are worried by putting a cold washer on her to unsettle her and then feed her. If she nods off before she's drank what you are satisfied with put the washer on her again to stir her again. If she hasn't got a fever and is still urinating/pooing don't be too concerned. Bethany will start feeding again probably when you won't want her to.... around middle of the night. I had issues with getting Loralei to feed adequately but the washer does the trick for me. If in doubt call Tresillian or Karitane for over the phone advice tonight for reassurance.