Your emotions are clues to your thoughts. When you feel worried or upset it's often a sign that you're uncomfortable with what's happening. This is the time to stop, slow down, and prepare to speak.
Remember that you are the expert about what's happening inside of you. Realize that you have important information about your past experiences and your current symptoms that your medical professional desperately needs to make informed decisions. You are the expert. Don't assume the caregiver knows everything.
Don't worry about offending your doctor or nurse by speaking up. They won't be offended if you show respect for their expertise and professionalism. Before describing your concerns, start by affirming this respect. For example: "I'm grateful for your attention to me and want you to know that I value your experience and skill in treating me. I also have a concern that I would like to share with you." Then share the concern.
Caregivers have a hard time with vague statements like, "Are you sure that's right?" or accusations like "I don't like the way you are talking to me!" Stop and think about what's happening that is making you uncomfortable. Look for the concrete facts that will help the caregiver understand clearly what is bothering you. For example, "The last time I took this medication I was given a white tablet to take twice a day. This time it says four times a day and it's a yellow tablet. That has me worried."
Show once again you are interested in the professional's point of view by ending with a question. "Is this correct?" or "Why should I be worried about this?"