has anyone ever coughed for this long

Are you having chest tightness too? Do you have a urgent care clinic you could go to? What doctors do you see and what meds are you taking?

I take Singulair, Asmanex, Xopenex as needed, Xopenex nebulizer as needed, astelin, clarinex, a saline nasal spray, Zantac (and a tylenol 3 every 5 hours for horrible back pain) and just came off prednisone.(honestly sometimes it's so hard to remember and I have it on the computer a list of what to take and when kinda makes it easier lol).

I also like drinking teas, just a suggestion have you tried drinking a warm beverage?
I would suggest that you possibly consider going to an urgent care clinic if you can get checked out and have your mind at ease.

I go to the doctor when I can't stop coughing because I get pnemonia so easy. I've had pneumonia 3 times before I turned 18 years old, Last time there were 3 black spots on my lungs. and I've never smoked!!!

Hope you'll feel better soon, you have my prayers and empathy!!!
As alway keep us posted and God Bless and good luck

If your cough is producing yellow/green sputum, you may have a chest infection and should get checked out in case you need an antibiotic to clear it.  Sometimes, even without infection, I find that the mucous is so sticky that it is difficult to clear.  I am on Visclair (a mucolytic) which makes it much easier to clear my chest and I also use a flutter device after my nebulisers which helps a lot.  A good way to clear your chest without such devices is to "huff" rather than cough for as long as possible, then cough the last little bit.  I don't know how to explain it more clearly, but it tires you out less and is more effective.  I hope this helps.