I was told by my doctor. ( I had this dry cough too) that she thought it was chronic sinusitis. She put me on Z-pak antibiotics and gave me codiene cough meds. This took care of my nightime cough. You may want to see an ENT?
Oops! Sorry I posted my question in comments. I'm new to this forum gig. My apologies and hope you get better.
We bought 2 guinea pigs 7 days before my 7 yr old began having terrible cough attacks. She's run a low grade temp for 13 days running, has taken codituss cough med (with codiend), breathing treatments with Xopenex, and has finished a round of Z-pack. Coughing is horrible at bedtime and through the night. Since she has a low grade temp I had disregarded an allergy. 13 days into this, I'm re-thinking everything. I'm looking for help. Is this a virus or allergy or what? She can sit in a room 6 ft from the guinea pigs and not cough at all. Her own bedroom is the same distance from the pigs and once she lays down, she's off and coughing. Help! Mommy