For the past couple of days i've had a bad tooth ache in my left 2nd molar. last night it started hurting in my left jaw and my ear.. is this normal?

Yes: this is "referred" pain from your tooth into your ear

No: Sounds like you have a infection which need to be treat ASAP. See a good periodontist or even a family dentist. do not put it of.

Tooth/jaw/earache: It sounds like you have an abcessed tooth, which will cause referred pain to your jaw and ear. See your dentist ASAP for an exam and treatment.

Tooth ache: No, it is not normal. you probably have an infection and possibly tooth abscess. he pain sometimes can radiate to the ear. You need to see a dentist. If your symptoms are getting worse and you cannot see a dentist over the weekend you need to go to ER to at least get antibiotics

Normal?: Neither the toothache nor the referred pain is normal. You obviously have a dental problem that needs attention right away. You should have sought dental care at the start of your problem. Things will continue to go downhill from here. When was your last dental checkup?

See a dentist ASAP: A tooth abscess won't go away without treatment and the infection may spread to your jaw, cheeks, ear, sinus and to other areas of your head and neck. A dental abscess is a collection of pus that forms in your teeth or gums as a result of a bacterial infection. Dentist will treat a tooth abscess by draining it and getting rid of the infection. See your dentist ASAP.

Yes: lower molars with inflamed nerves often radiate pain to the ear! See your Endodontist ASAP!