Brandy is about 7 days away from being 3 months old. A vet had put her on the antibiotics and told me her tonsils were inflamed. The regiment was 7 days antibiotic and four days cough medicine She has been eating and playing but the cough kills her in the night. Some sites say the meds work the first four days and other say it takes a while. I don't want to return her, what should I do? I'm taking her to the vet in the morning.