I have had 5 "colds " since November. Throat infection, stuffy nose & sinuses, some sneezing & minor coughing. The same pattern keeps repeating itself. I am well for awhile, and then sick again for 10-14 days. No fever, major coughing. I noticed my water bottle had yellow junk in the straw. I clean the spout and bottle, but have neglected the straw. Could I be re-infecting my throat with bacteria from my water bottle?