That depends on what it is being used for. For any type of pathogen such as your condition, Colloidal Silver would be the best choice since it is a supreme pathogen destroyer. I reach for it every time I have a problem with infections (and many other times as well). For really tough infections, I often add these natural pathogen fighters:
oil of wil oregano
olive leaf extract
That combination has never failed me, even for infections such as MRSA.
BE sure to take PLENTY of Colloidal Silver - perhaps as much as 8 ounces a day for the first few days, then cut back to 2 ounces for a couple of weeks and once the infection is gone, a couple of teaspoons or more per day for awhile. Eventually, you would only need to take it as needed - but be sure your infection is entirely gone.
Also be sure to take a quality probiotic in between doses after you cut back to a couple of ounces per day and continue to do so in order to restore your gut flora to proper balance.
I also advise that you purchase and use a top quality true Colloidal Silver solution, such as Utopia-Silver 's Advanced Colloidal Silver (my favorite) or Purest Colloids Mesosilver. Some people may try to tell you that homemade ionic silver is just as good or that ionic silver is superior - but they are wrong. Homemade and commercial ionic silver works fine in most instances, but for the really tough ones you cannot beat top quality true colloidal silver.
My suggestion is to get the colloidal silver for really tough infections - and it sounds like yours is in that category - and als get a good home generator to make your own mostly ionic silver solution for general use to save money.