Diagnosed With Klebsiella/Strep Group B Oral Infection. On Augmentin Is This Medication Enough?

I am a healthy 53 year old woman who has just been diagnosed with a Klebsiella/Strep Group B oral infection. Treatment is 875 mg. Augmentin twice a day for 10 days. After only 5 doses, the white coating on my tongue has completely disappeared and I have energy back as well, but there is still some burning sensation on my tongue and roof of the mouth. I am not sure how the infection was contracted- perhaps a possible infected toothbrush that I used consistently for 5 days or so. Is this an overly serious infection, or will I do well on the Augmentin given that there has been significant improvement so far? I don't know much about these strains of bacteria, and everything I read on the internet is just rather scary. Thank you..