Hello, I'm Dr. Deb and will do my best to help you today.
I'm sorry that you both got stung or bitten by some sort of flying insect.
I probably wouldn't be too concerned about Doug's increased respiratory rate especially if he still seems a little uncomfortable. If he were my dog or my patient, I'd give him Diphenhydramine (aka Benadryl here in the States). The dose would be 1 mg per pound of body weight twice a day...although only one dose may be needed.
Sedation can be seen as a side effect, which in this case, wouldn't necessarily be a bad thing.
I hope this helps and he seems more comfortable soon. Deb
You're more than welcome.
I don't doubt that he was feeling some discomfort which is why he was acting like he was but I've found this breed (especially when they're young) to be a tad "overly dramatic" at times which might also explain his behavior.
Hopefully, he'll be back to his normal self tomorrow when you both wake up:) Kind regards, Deb
Thanks for the rating; it's greatly appreciated.
And, best of luck with him. Kind regards, Deb