I don't think there is any harm in taking him to the Dr I wish I had, get the Dr to have a REALLY good look at his ears for any fluid & also the reflux, they are 2 reasons why a child can be unsettled at night. Also teeth under the gumps putting pressure can be worse than when they actually break through. I know around 22 mo (with a new born) DS1 had a horrid time with teething even though no teeth.
With the Bronchitis side (which could be an asthma side but hard to know in young children) & the reflux, don't give neurofen or asprin based pain meds if you can avoid it & only on a full stomach. the Paracetamol based ones are far better. We found with DS1 that even with a drink of milk at night neurofen made him sleep worse than if we didn't give him anything at all & I think that was because of the after effects of undiagnosed refux.