I developed a cold the week after Thanksgiving or a sinus infection but believe it was a cold. Stuffy full head that lead to coughing ...sometimes uncontrollably. That subsided but still had the stuffy head and then horrible headache in the neck area. Called the doctor...Prescribed Amoxicillen for 10 days. I am 5 days in.. Headache gone ...mucus thicker and seems less but now have a slight case of diahrea or loose bowels a few times in the morning....and my knees hurt when I move like my bones are rubbing together....Is this all connected????