Just because you have socialized Health Care, it doesn't mean you have to go to the doctor when you're sick eh? Like someone else mentioned you may have chronic bronchitis or worse Mycoplasma Pnuemonia (walking Pnuemonia) which is a very hard bug to kill! I had it last year.
Over the counter cough remedies are little more than water and home remedies are less than that.
Go to the doctor! 2 shots in the butt, an antibiotic, a decongestant, and a narcotic cough medicine should fix you up... if you don't feel alot better in 3 to 5 days , go back to the doctor!!! It's common sense, you're not much use to anyone sick, and the longer you let it drag on the harder it will be to cure it.