Oh A., I was you just this past year....I had a horrible sinus infection that would not clear up, which turned into a bilateral inner ear infection, which perforated on an airplane ride...I cannot even describe the pain and suffering it took to recover. I also suffer from migraines, and that turned into a whole other problem.
So, yes if you are on heavy duty antibiotics for 6 weeks....do not walk, but run to your health food store and stock up on good, high quality yogurts, like Greek, or Acidophilous products. Your best bet is to purchase the live ones in the refrigerator section and time the taking of them to be opposite of your antibiotics schedule. Make sense? Pace them so they have a chance to live and do their job.
Also, are you using the Neil MD Sinus Rinse system? Got to get in their and clean out with that solution. It will make a huge difference.
PM me if you need more support. I was miserable for months...my hearing was negatively affected, I had chronic headaches, I couldn't understand, sounds were either too loud or too soft....
GL!!