So, it turns out that the chest x-ray we had done in December wasn't quite as clear as we were led to believe. The quote from the pulmonologist was "They told you this was normal?" Anyway, so we have bronchitis. And now we're working on learning a new medicine delivery mechanism. We had finally gotten pretty good with managing the nebulizer treatments (even if that meant that RB and I were running out of fun, upbeat songs to sing to the little man during them), but now we're using an inhaler for both his medicines, and I feel like we have a little asthmatic in our house these days -- one inhaler on a regular schedule for long-term management, and a "rescue" inhaler for his extra-fun coughing fits.
How do you use an inhaler with an infant, you ask? Well, first you sacrifice a chicken and then you do a little voodoo dance together with your best cat-pill-giving skills. Not really. We pump the inhaler into a chamber attached to a tiny pediatric mask which we hold over his face and count his breaths to make sure he inhales 6-8 times per pump. Then we wash off his face and rinse out his mouth so that the medicine doesn't irritate his skin or leave a nasty taste in his mouth.
Hopefully this works. Because if not, the doctor is talking about next steps which include full sedation for a bronchoscopy, and I'd rather avoid that if we can.