My cough that I've had for 3 weeks has gotton worse I don't smoke im in massachusetts and I've tried all kinds of cough medicines what's to do next?

See doctor... Possible etiologies of your cough include bronchospasm from any cause, gerd, post-nasal drip or even a combination of factors. Each of these have different treatments so you need to see your doctor for diagnosis and treatment. If you are short of breath, go to the er.
See a doctor. This is clearly not a going away cough. Go get examined please. A chest x ray may be indicated.