Right, but I've never heard of neck pain without headache. It's referred from the meninges so it'd be very strange to present like that. It's always possible but the likelihood is maybe < 1%? Additionally, symptoms typically start improving within 7-10 days.Any answer on the mono testing? If shes never had mono it can be pretty brutal. Comes with neck pain and fevers for sure.
Headache can sometimes manifest as neck pain if its referred pain, I just wouldnt rule out.