Severe lower left side head pain. why is this happening? its not like a headache. don't know if it's migraine.

Midface migraine: Although migraine is usually considered a headache, it can also present as pain in the teeth, jaw and/or the maxillary sinus which often confuses the diagnosis. When this presentation occurs, it is referred to as facial or midface migraine. These patients do not have a primary complaint of headache. Instead, they may experience throbbing pain in ear , jaw and side head. See orofacial pain doctor.

Possibilities: Consider problems with jaw/ dentition, sinuses/ nasal, referral from neck, possible neuralgia, and of course, a migraine cause. You could contact your doctor, but also, schedule Concierge virtual visit here onsite.