Chest cold and out of breath

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Is it normal to be out of breath when you do any physical activity when you have a chest cold? I have dance competition auditions Saturday so I need to maintain some flexibility, I wasn’t doing much, I did like 3 front kicks, 2 side kicks, and one back kick on each leg, and I’m out of breath. I normally dance at least 2 hours with out even slightly getting out of breath, so it’s not normal for me. But the last time I had a chest cold was about 10 years ago and I don’t remember anything about it, and I didn’t dance then. I’m kinda worried about getting through dance competition auditions if I can’t even do 5 minutes of physical activity. I am on an antibiotic for it (I was just really sick a couple months ago so my doctor knew about my auditions and decided to give me the antibiotic to make sure it didn’t get worse since the next appointment was after my auditions) so is it maybe the antibiotic?

I know not everyone here is a doctor, like I said the next appointment I could get at my doctor is next week so I can’t go in until then anyways so I figured I’d ask here.