I'll jump on board that you might need to call to make an appointment. I know it hurts and sucks, but you won't know the reason why he forgot until you meet him. I waited around for half an hour for my T once, and finally left. At first i was like "Uhhh did i get the day wrong? The time?" But no...then i was like "She forgot!? WTF?!" But even though it made me very anxious, I called and left a message like "I thought we had an appointment today?"

She called me back a few minutes later, apologizing profusely--her client had gone over before and she didn't realize, and the front door was locked (which is why i thought she forgot, plus she walked that day, so there were no cars), which was not supposed to happen.

Long story short, I could have spun out and made a million reasons up in my head what happened, but i forced myself to call...and it turned out ok.