It's okay that you're nervous about telling your pdoc. I'm always nervous too, but even when I admit to noncompliance, he doesn't berate me. We usually talk it out and come up with a plan to make sure this sort of thing never happens again, even though I still struggle with it. (Usually this involves him understanding why I need/want a medication change.)

I don't like my pdoc, but it is the right thing of him to do.