Brooke just finiehed reading this post . My prayers follow for you and your baby Tatum. do think the infection may be making her pant so. I have had many Lung Infections myself and it does make it hard to breathe. I would keep her on the antibiotics and make sure is is drinking enough water to keep the meds working. Keep an eye on her and if she seems to get any worse.follow upwith your vet - The antibiotic may need to be stronger to knock out the infection.Sending healing hugs to all