I think the best way to do it is to be straight forward about it. If you have a competent doctor they will be sensitive to your anxieties. I had the same problem when I had one. I had an NP do mine and she was great with dealing with my anxiety and freaking out when it was going on. I do suggest letting your doctor know before going in for that day. Also, your Doc gave you a six month window. I would use that time to get to know her better so you will be more comfortable with her. Find reasons to go in to get to know her (assuming you can afford it). I don't know what reasons that would be, but I'm sure you could come up with some. Let your doctor know that is what you want to do. Good luck.