My ears have been plugged for about 3 months now. I took the Z pack for 5 days the first go round. Got a really bad sore throat about 2 weeks ago. Went back to the doctor and got 12 more days of the z pack and been taking sudafed during the day and benadryl at night. Ears are still plugged and still have a couple little blisters in the back of my throat. I also feel like there is a lump in the back of my throat. Any ideas?