Ben had RSV right at 4 months, and it was horrible, so I really feel for you! As for your son’s current symptoms, it could very well be leftover from the RSV, as it really took Ben almost a whole month to get over it completely. That being said, the cough and runny nose also sound very symptomatic of a reflux flare up. I think I would also try the meds again for awhile and see how it goes. You can always try to take him off then again in a couple of weeks.