No it would not be the meningitis history unless she has been exposed to it again. Fever would be showing as well with this.

It could also be that her neck is sore simply from the way she slept. As odd and funny as this may seem to a child it is something that does hurt and may be of no connection to the strep. She is just now finishing her meds and the strep bacterial are indeed still present. It may be that she may have to go on a second dosage if her sore throat returns and the sore neck may be an indication of this. Sometimes the right specific antibiotic must be taken to clear this up. If she is complaining of pain and discomfort tomorrow then follow up with her doctor. Do not ask her as soon as she comes in how her neck feels. Let her do her things and just watch how she acts. If you bring it up then she is more liable to say yes. Watch her for awhile and then ask her. Or if doing well say, it looks like your neck feels better now does it?. This will give you a better indication of her current condition. But this just sounds as though she has some strep left over or slept on the wrong side with her neck. Let me know if I can continue to assist you.