Do not feel alone as there is some weird bug going around that 98% of people I know have it. Bad enough you get it once, but several have had it come back 2-3 times..it is a nasty bug. All say the same thing, the cough just goes on and on till your winded and sore. Hubby has had it for over 2 weeks.
Did you see a Dr. at all as green phlem usually is an infection so you just might need an antibiotic. Have you ever done a sinus rinse with either a Neti Pot or spray bottle? My ENT gave me a Neilmed sinus rinse bottle and it took a few days to get use to, but it does help. Your suppose to do it like one hr. before bed, but Lately I seem to wait till I feel totally plugged up and then do it, and yes, it has helped me quite a bit. Usually some hot tea with honey helps as well.
Wishing you well, and feel better soon....JJ...