Persistant, non-productive cough: Part of having IPF?

I as diagnosed with IPF several months ago and am taking Ofev with minimal side effects, so far. I'm also taking industrial-strength, prescription Nexium for GERD. In the last month or so, a shallow, non-productive cough has gotten worse and more frequent. When I roll over at night, I cough. Is this something that comes with IPF? Any ideas how to deal with it?