Lately I have been having this strange pressure/fullness feeling at the back of my head at the base and been getting vertigo. I didn't think that much of the vertigo because I have always had it on and off usually due to ear infections. I had a head cold a few weeks ago and after I was better I still had a very sore throat so I went to the Dr and she said it was very red with a bad sinus drip and put me on antibiotics. The throat stopped hurting but I keep getting a thick build up of phlegm/mucus at the back of my throat that won't budge with coughing or gargling and the only way to clear it is to scrape it out with a cotton tip and that happens a few times a day, the first time it built up that bad I couldn't breathe. So I am wondering could it all be related? The pressure, the vertigo and the mucus? I am hoping to get into see the Dr tomorrow but was wondering if anyone knows what it might be caused by?