My son's eyes are getting stuck shut by a green crust. It starts out as like a fluid coming from his eyes, like tears, then it forms to a green crust and the only way I can get his eyes open is if I open them myself and clean them. The pediatrician can only get me in tomorrow no sooner. It's been happening since last night and it's progressively getting more and more. Should I take him to urgent care or wait till his appointment tomorrow?