Please help! we recently got a new batch of chicks and one of them started breathing heavy and wheezing today:/ She is still eating and running around with the two others but her breathing seems painful! We raise our chickens as pets so I will be very upset if something happens to her

Any advice or suggestions will be appreciated! I'm sorry you are having trouble.
How is she doing?
Can you post some photos of your chick and your brooder setup or a video?
Gently look in her throat to see if there is anything obstructing her airway.
If you think she ate some bedding (which chicks will do sometimes), offer some chick grit free choice.
If she is eating, drinking, pooping and active, just keep an eye on her, if she shows any symptoms of lethargy, sleeping alot, weakness, not eating, etc. let us know.