Unfortunately, whoever is the one that signs off on the pump is the one that gets to decide when - not that you can't still push for it. If your CDE puts the paperwork in front of the endo and he won't sign, you are stuck waiting.
Once you are able to get back to exercising, you should be able to lose any weight that you have gained - I am someone that needs to exercise to keep the weight off and if something happens that I can't, the scale goes the wrong direction. As soon as I get back to exercise, I can take the weight back off.
I think we are all harder on ourselves that people around us. I am sure you look fine, but it is your body and you are the one that needs to be comfortable in it. Once you can get back to exercising, you can find a place that you feel good!
Just know that you are not alone. Just think about the new people you talk to and become friends with online because they get you and your real life friends don't!