Holy cow, Melissa! That is just awful! I tend to agree with everyone else here that it sounds like someone, somewhere along the way goofed big time. And, I have to wonder if the gauze may have been harboring the infection, too. I know you won't back down until you get answers.
You probaby already know this, but since you have been on antibiotics so much, your body is most likely developing an immunity to them. I have had seven infections (various) since surgery and have been on that many different antibiotics. When I questioned my GP as to why I seem to be getting infected by every stinking thing that comes along, he told me that antibiotics, when used regularly actually suppress your immune system creating a "perfect storm" for getting more infections. He referred to it as the great Catch 22 of antibiotic drugs. Now, I am sure that this was an oversimplified explanation - but I can tell you that I haven't had so many infections in the last 10 years as I've had in the last 10 months.
Try to make sure that you are feeding your body lots of very nutritious foods, things that will help your body's immune system get back to 100%.
Please keep us all posted - this is just shocking.
Debbi