I'd most definately go to your gp and have your bub checked.

Last week our DD had a sniffle, went to gp as she sounded quite bloked in her nose, he said she was fine, less than 24 hours later she was gasping and struggling to breath, very very noisy, wheezing, not much coughing. She went from sniffly with a cold to chest and stomach sucked in trying to get air within an hour. I was on the phone to my gp about her noisy breathing when she went downhill and started to struggle to breathe. Rushed to his rooms, then to local hossy where he gave her prednisolone, then we had to take her to the next town over to the big hossy, they hooked her up to monitors etc and said she had croup. Was given predmix again the next day and now she is nearly all better.

I have never been so scared in my life! She was fine with a sniffle then struggling to breathe, and that was daytime, I am so glad it happened in day time rather than at night time. We live in small town, ambo's come from next town over, if you go to the local hossy you have to wait for one of our gp's to come up to see you. So it was quicker for us to put DD in the car and drive the 30 mins to the hossy in the next town than wait 30 mins for the ambo to arrive for her.

I hope your little one improves soon and is okay.