I'm having flashes in my left eye occurring every 2-10 minutes. can i wait until tomorrow to be seen or should i go to er now?

You can wait: While this most likely is caused by a benign event termed vitreous syneresis, It could be a retinal detachment. The ER evaluation will probably not make this distinction and will refer you to a retinal specialist the next day. You should not eat until seen and make an appointment the next morning with a retinal specialist. Meanwhile take it easy and do not engage in sudden head motion.

Flashes of light: Seen in a dark environment only can indicate vitreous (gel-like substance inside eye) traction (pulling) on the retina. At worst it may indicate a retinal tear, break or detachment. At best, it is a vitreous detachment that may be benign (harmless). Visualizing floaters or blurred vision in any quadrant heightens the risk of retinal pathology. See your Ophthalmologist today.