Don’t allow yourself to be admitted on a nonemergency basis on a Friday afternoon or evening. You will just languish, expensively and in no particular comfort, until Monday. Most of the labs that would be performing your diagnostic workup don’t do those things on weekends. Wait until Monday; better yet, Tuesday, some experts say. By Tuesday, the hospital is back in gear after the weekend, and the end-of-the-week blahs haven’t hit yet.