L.M.
It's most likely allergies. But she could be teething her last tooth? I didn't think so at first for my son who's also 26 M. too. He would constantly bite down on his pacifier and faux cry/whine all day. When he wouldn't eat his chicken nuggets, rice or mac n cheese or even suck on a dum dum, then there was definitely my sure sign of there's something wrong with him. Plus he had a high fever, so he did did have strep throat last week too. He had azithromax antibiotic which you take for 5 days, and then it "covers" for another 5 days.
If she's not any better, take her back to her dr.
Don't ever wait a month. Assume week to week. Whenever my kids are sick, I have them get checked out and even get a follow up appt. Good luck!