T.C.
I really wish I knew what to say to help.... just do not give up! Possibly speak to a lactation consultant at the hospital you delivered her or ask her pediatrician to recommend one.
My guess is that you are stressed now every time when it is time to feed her. First because of the reflux and now because of how she is acting. You are probably a bundle of nerves wondering what she is going to do and if she is going to latch or not. RELAX!!!! :)
I know when my daughter was in the NICU (she was a preemie) there was one nurse who would not leave while I was nursing... started yelling at me "come on, just let me give her a bottle, you are starving her" and I was getting all stressed out. She ended up crying anytime I would try to put her on unless I was completely relaxed. After speaking with the lactation consultant she explained that they can sense how I am feeling. I finally told the nurse off and also made them take out her NG tube and then I had no problems after that!
Make sure though that if you do end up giving in to give her a bottle that you pump so you do not end up having supply issues.
The best of luck to you... just do not give up completely, you are doing the best thing in the world by breastfeeding- in my opinion! Many blessings to you and yours!