Hi, K..
I have 3 thoughts... First one is, I have heard that thrush is extremely painful. You may want to discuss this with her pediatrician. The second thought, rub your finger along her gums and see if you feel any bumps. It's very early for her to be teething, but you never know. Thirdly, you may want to have her checked for an ear infection. My son would get ear infections, and have no other symptoms, no fever, no runny nose, nothing. Except when he drank his bottle he would scream (I guess the pressure that builds up in the ears from the suction of the bottle becomes very painful). He would do the same thing - suck a bit, scream, suck a bit more, scream, etc. I'm not saying your child has one, but it may be worth bringing her in to the doctor.