I have pink eye that keeps coming back, left eye. Every couple of weeks.?

Red eye. Recurrent pinkeye may be due to an infection, but it also may have other causes, ranging from dry eye to a bacterial pinkeye. If this problem is not going away, all your local ophthalmologist and arrange an appointment.
Doubt pink eye . This does not sound like pink eye. You need to be evaluated by a corneal and external disease specialist who will consider other types of infections, allergies, floppy lid syndrome, etc.