I've had chronic toothache for a week now the pain has gone to my ear & keep geting headaches. what could this be?

Toothache : Toothache or pulpitis is the likely cause, and referred pain could explain ear and other symptoms. A trip to the dentist is on order !

Irreversable: You have an irreversibly inflamed nerve. The pressure of the inflammed tissue inside the tooth is causing referred pain. Ultimately you will have 2 voices. Extraction or root canal therapy. Only a dentist can help you to make the right choice. Delaying will only make matters worse: more painful, more expensive, more time consuming, more unpredictable, poorer long term prognosis.

Root canal: Most likely sounds like a root canal. Visit your dentist asap.