Is your pain on the top or bottom arch? Have you had any allergy or sinus trouble? Sometimes sinus pressure and congestion causes radiating tooth pain.
Interestingly the toothache disappeared when I started taking blood pressure pills.
Seeing a dentist to rule out dental pathology is advised. If there is no identifiable dental pathology, you are probably having non-odontogenous toothache. In that case, you may need to see an Orofacial pain specialist.