Definitely change providers. Please keep this in mind- you have hired this woman to help you. The difficulties you've mentioned are not out of line- you are not drug seeking and had been doing great on the old dose. As for being overweight, smile at her and pray that she get bleeding hemmorroids. I think this whole nation has gone 'obese nuts' and want to jump on that band wagon. For crying out loud, not everyone is going to be tall and thin. It has never happened in the entire existence of our universe and am pretty sure it's not gonna happen in 2009. If you feel good and are active at your weight, don't sweat it. Life is way, way, way too short to be worried about being cuddly.
Make sure and transfer your medical records over to the new doc and you also might want to take a peek at them to make sure the anal-retentive hasn't put something in there that isn't true. You have a legal right to write a 'rebuttal' to be placed in your chart. The law doesn't let you remove things from your medical record (unless it's the wrong patient's info) but you can certainly challenge things. Take care and enjoy the weekend :) :) :) :)