Could Influenza B Be Affecting My Healing Tonsillectomy Site, And What Can I Do For Severe Throat Pain?

Hi, i currently have influenza type B and symptoms are pretty bad, however my throat is killing me! I should mention that I just had a tonsillectomy a month ago and I had a really hard recovery time, I also hemorrhaged and had to have a 2nd surgery two weeks in.. So i m concerned that my almost healed surgery site is being affected... also am wondering if there s anything I could do for my throat pain, naproxen isn t helping and chloraseptic spray only lasts about 5 minutes? Also I was only prescribed Bromfed DM, but since I have a wet cough (I can feel the mucous but it feels stuck in my lungs) Is it okay if i take mucinex DM with the Bromfed DM? Or should i alternate between the two?