My older ds (just turned 5) and I have had a cough for a little over 3 weeks now...It's not a terrible cough, we only cough every once in a while, but when we do it's really hard and phlemy. It hurts my chest and back to cough. Just in the last week we've also started having nasal congestion that really sucks...I'm not sure if this is a second cold or allergies. Anyways, the cough is what is bothering me, is it normal for a cough to last this long? Is there anything I can take to help it go away? TIA!