frustrated and worried

So I'm worried and our pediatrician has been useless so I turn to all of you: our little girl has been emptying her stomach frequently over the last two weeks. We were told it's reflux, so I've been pumping to feed her upright to help. I haven't feed her at the breast for two days now, and I feel disconnected from her. What are we doing wrong? Am I a bad mother for not putting her to the breast? I feel like she's more jittery which I know is normal most of the time, but when she was born she was jittery from low blood sugar so if course I'm worried. Please advise!