I know this is totally silly, but I've been amazed at how nervous I get asking doctors all the questions I have to ask.
I've found myself actually saying to my therapist "Oh, I don't want to ask so-and-so about that. I'd just feel like a bother." even though it's a question that's really important to me, etc.
Then of course, there are the doctors who's response (or response from their staff) is curt, or doesn't bother to answer the question, or side steps what you're asking like a politician would, or a corporation sending out cookie cutter responses. Which makes it even harder to feel good about asking those questions again, etc.
Anyhow. Yeah. I've ultimately learned to suck in my pride and shame and just ask every question regardless how silly or annoying it may seem, because it's your body they're going to be dealing with, ya know?