Just want to reiterate what everyone else said CALL YOUR DOCTOR AND KEEP CALLING. Until you can reach them, I'd go back to taking just Water and Protein shakes/protein drinks. You body can get by on just that- it really is plenty! You probably haven't done anything irreversible yet. For the reflux, ask your doc about going on Nexium, which is a higher class of anti reflux drugs. That is what I was taking before my surgery, and it's what I continue to take. You can open the capsule and take it in a little sugar free applesauce.
I'm really sorry your family isn't supportive. Does your surgeon/team know this? I hope there are lots of support groups you can go to, and that you find a good therapist.
Look, we are all here because we have issues with food. I think we can all relate to making a food "mistake" in our lives- binging, going off a diet plan, etc. But now is the time to realize that for your health and safety, you have to be strong enough to beat back those urges. Maybe you weren't as emotionally prepared as your thought you were. It happens. But it's time to MAKE SURE you get emotionally prepared and fast.
Also- try and spend less time with your family. Don't sit down to dinner with them. Eat with friends who aren't going to pressure you, or better yet, eat alone for awhile. Food is social and food feels like love, but there are lots of other ways to connect with people. Meet a friend for tea. Go for a walk. See a movie. Go to a museum. You can do it!!!
GOOD LUCK! I feel for you.