Pre-emptive Cancellation

I had two separate medical appointments scheduled for next Monday morning. (I was trying to be efficient and make one trip to Palo Alto Medical Center serve for both a general diabetes check and my annual diabetic eye screening.) Although I still don't know whether the mechanics will have my van ready today, I think it's prudent to proceed as if it won't be. I can, after all, reschedule the appointments later when I know I'll be back in the Bay Area with a working vehicle. Also, it will give me a chance to schedule the eye exam for late afternoon so I can do it after work, since dilating my eyes makes me useless for close-up work for a couple of hours.