Hi there, about 9 days ago I was diagnosed with a sinus infection, but the problems started occuring 2 weeks ago today. My doctor gave me auro cefuroxime i beleive it is called, I have one more day left on the anti biotics it took the head aches away and sinus pain, but starting yesterday I developed a really bad sore throat, I looked down my throat today and noticed white spots, I have really bad post nasal drip as well, but it is really hard to cough it up. What do you think it is?