There are two separate issues here, from what I can see. First - give yourself a break and allow yourself to change your mind and ask for what you need. The message could be "please call me Wed." But wouldn't you want a client to be able to call you if he/she needed you -- even if they at first thought they didn't? I think it shows courage to ask.

The second things that strikes me is how quickly you move to "hating" him. Testing a therapist is to be expected, but it sounds so extreme - especially after several good sessions together. Any ideas why it goes this way for you? After all this time, do you still expect him to fail you?