Puppy vaccination side effects

[AndIAlwaysComeBack]

Our 12 week old cockapoo pup had his second round of vaccine at 4pm today. He hasn't been quite himself which I understand to be normal. He has eaten a bit and has been toileting but he just seems to not be able to get comfortable.
He's on the sofa with us and what's been worrying us so much is he is really rapidly breathing.
No 'difficulty' as such but just super fast. Do I need to worry? Just love him so much already and finding myself so anxious! Googling hasn't really helped so my thoughts turned to you in The Doghouse as you all seem so knowledgable and caring about dogs. Thank you so much for any advice.

Hi, no advice I'm afraid, not getting our cockapoo until August but wanted to see if he's any better this morning? Others with more knowledge will come on but expect they will recommend a call to the vet asap if you haven't done so already and there's no improvement. Pets are such a worry!

Sparkly thank you so much for your reply. I remembered my friend's DH is a vet and called him. He said to keep an eye and if no better in a couple if hours to call OOH vet. Literally 10 mins before time was up he perked up and back to normal now. Such a worry and I'm so grateful for your response thank you.