L.G.
I would try Kim C. My daughter went for two years with a gut-wrenching cough before she finally got some relief. She saw every specialist you could imagine in Dallas and Austin and all they did was treat the symptoms with more steroids, breathing treatments, etc. which only gave a couple hours of relief (and lots of money). They just blamed it on her asthma. She missed so many classes at college and had to quit the track team because it was so bad.
A naturopathic doctor (sorry, she is moving away from Austin), finally found the cause of the coughing. Putting it briefly, her body was so full of drugs (that she couldn't absorb anymore) that she needed a detox and lots of natural vitamins and supplements. It stopped her cough in two weeks! Now she just takes a daily multi-vitamin.
Was it expensive? Yes. Was it worth it? Absolutely. We spent more in two years on all the other doctors than we did in the one month with the naturopathic doctor.