Severe left eye pain

My left eye has been bugging me for a couple of days. It feels like there is a muscle spasming behind my eye, however, my eye isn't twitching. It hurts really bad and feels like something sharp is stuck in it. I'm not sure if I should go to the ER or wait until the morning to call my eye doctor? The pain is new and I'm definitely not one to run to the ER for every ache (obviously, as I have stupidly not gone at times when I should have), but it kinda freaks me out since its my eye. I know I have the beginning of a detached retina in one of my eyes....can't remember which one. My eye doctor always checks it out real well each year to make sure it hasn't gotten any worse. They told me to go to the ER if I started to see spots or had blurred vision. I haven't had any of those symptoms so I doubt that is what is going on. not sure what to do.....guess I'll just wait until morning and then call my eye doctor.