I have been sick this past week week with sinus pressure, itchy ears, sore throat, watery eyes, and sneezing. The sore throat has been painful for 3 days now and when I looked for signs of strep today I noticed a very dark, almost black looking spot on my throat. I was able to reach it with a q-tip and it came out bloody. Is this normal with a cold or sinus infection? Or could it be something more severe and should be checked out by my doctor?