My head hurts and, my period just started today?

Maybe migraine? Some women will get a severe headache when they have their period, called a menstrual migraine. They can be very painful and make doing normal tasks hard. If you have a severe headache with your periods, talk to your health care provider to discuss treatment options.
Anything. Headaches can come from fatigue, sleeping too much or too little, sleep apnea, snoring, being dehydrated, having chronic sinusitis or allergies, too much caffeine or over the counter headache medication, high blood pressure or something more serious like a tumor. See your doctor and get checked.