As to your labs, as a geno 3, don't know where the nurse came up with that number -- but I'd make sure you definitely get those four week labs. The blood should be drawn for the week 4 labs either the day before your fifth injection or the day of your fifth injection but before the injection. Also make sure you get a very sensitive viral load test. One good one is "Heptimax" by Quest Diagnostics that goes down to 5 IU/ml. If not available, ask the Nurse what is the sensitivity of the test they use. If it's more than 50 IU/ml, I'd ask for a test that is 50 IU/ml or less and preferably sensitive down to 10 or 5 IU/ml.
An unfortunate story all too familiar with many treating with GI's. Hopefully you will have better luck with the liver specialist at the new hospital and do make sure it's a liver specialist (hepatologist) that you will be seeing and not another GI.
.Can't advise on when you should tell your current GI but personally I'd wait until you made a decision to switch before telling your current doctor you're shopping around. Meanwhile, if you have a UTI, by all means get to a urologist as August 12th is a very long time to be holding that urine in!!!
Sorry to hear about your ordeal. First of all, I would definitely look into a 2nd GI as I would not tolerate any doctor who's stance is we do not give rescue drugs we reduce or stop treatment. Most good doctors, including Dr. Dietrich who is on the Hepatitis C expect forum here, will tell you that you need to stay on treatment, not reduce or stop if you want to have success. They will give you rescue meds to help you stay the course before having to resort to lowering dosages. I also would not be real happy if my PCP was so uncaring although chances are he does not understand hep C real well anyway, most PCP's don't. I also would not be real pleased if the covering doctor tossed my paper away that I wrote my sides down on. I think you are making a good call by going to U of Miami. Remember this is your body and your treatment if you are not happy with the current level of care you are getting then I would definitely change it. You are in charge! Good luck!
Also while they may say that being overweight can reduce success rates do not let that deter you because it does not mean you will not have success, just that they see increased rates with people who are closer to their ideal weight.