Welcome as well. There are several things you need to do. Firstly, as Rica said, look up http://www.CPn Help.org
Next look up my husband's website, which you can find on CPn Help, but is probably easier to find here:
which it sounds as though you might have done already from your writing. On this, though, pay particular attention to the following page: http://www.davidwheldon.co.uk/supplement_rationale.html
, as well as the adjuncts mentioned on the first page. Of these, a very good start before even getting going on the abx is n-acetyl cysteine or NAC.
Since you are from the States, you will not be able to get roxithromycin, so ask for azithromycin in the amounts you mentioned. Metronidizole, or flagyl as it is more usually known in the States, is best not started until three months or even longer into the treatment, but the amounts here are: 400mg three times a day, eventually for five days every thee weeks, but start off on just one day and build up from that.
Your GP might be very wary of all this, so glean as much info as you can from both sites before you go to see her. You are also quite welcome to email David or Charles Stratton and so is your GP.
Take your time to take in all the information and write to me if there is anything you are unsure about.