Find a doctor that will listen if he won't ... be considering he is an OB he might be a lot more valuable as far as the clomid than a regular GP. A regular GP that listens and cares can be a great thing though ...

If all else fails, clobber him over the head with something Oops, I mean cry
There is one of those desk calendar things in the room that could knock him out...
Actually, if this next appointment doesn't go well, I'm changing hospitals. If I'm preg this cycle, I'm doing the same to avoid him. One more chance, Dr Moron! One. More. Chance. *evil eyes*