I was in an accident Weds night. I hit my head on steering wheel and window. I was a little dazed and confused at first but was fine. Today at work I got a little forgetful and now feeling a little nauseated. Should I go to ER or can I wait to see how feel tomorrow?

Given your brief description, dazed and confused, you should have been checked out at the time. I wouldn't put it off any longer.

Where you seen the day of the accident ? You should have been. I would go to a urgent care facility to be checked out.