You did not say if your were still having throat problems. If you have a 400 count (I don't know the reference range on your lab result) of streptococcus or other bacteria, it could mean you have a lingering infection, even though your dr says it's nothing. I would take that seriously and maybe get a second opinion. One time I had a rare form of aerial staff infection in my throat, and thinking it was just a cold or candida symptoms I kept taking my probiotics, echinacea, vit C, etc. and it never really went away. Even a low-grade infection can take your immune system off candida duty in order to fight it. Then the candida in the gut gets out of control.
Good luck!