How long does an ear infection last and/or does it go away on its own? My left ear/left side of my face has been hurting for at least two weeks.

Ear infection. Newer recommendations in Europe for ear infections is that they let it sit for 48hrs bc can improve on its own. If still in pain then they treat it. Can take weeks to get better, depending if the antibiotic is working, since you can have some resistant cases.