Kelli had her appt yesterday and some of her little bumps are infected

The vet said it's not a food allergy, but rather an outside pollutant she thinks. Could have been either airborn or something that she may have come in contact with (she LOVES to roll in the grass...and always rolls neck first, which is where the bumps are). She's on three meds, an antihistimine, prednisone and an antibiotic (I'm sure I spelled the first two completely wrong lol)...the antihistimine we have to keep giving her until it's cool out, so the rest of the summer. They're going to call us in 5 days to check on her and make sure she's doing okay.
She hasn't bit/licked her front or back legs since we started giving her the meds last night....I just wish the little bumps would clear up as fast, I feel so bad that we waited even a day to take her. She said it might have even been a reaction to the different shampoo we gave her, it's just so hard to tell.