My best discovery - to help both you and your doctor during your next office visit:
Type up all of your symptoms (with dates) and make a numbered list of all your questions. My last question on the list is something like, "If I follow your treatment instructions and still feel bad, what would the next step likely be?"
This list helps your doctor because s/he can read the info faster than you can say it, and can immediately estimate how much time will be involved. S/he doesn't have to be thinking, "How many more questions does this person have ... I need to get to my next patient ... Better try to wrap this up."
This helps you because you won't forget to ask something important and, while jotting down the answers on your copy, you can get in a few follow-up or clarification questions.
A symptom journal is particularly helpful if you are dealing with a chronic or hard-to-diagnose problem, such as not-so-early-onset Lyme disease...
For illness that affects memory and/or brain function, it can be good to have a spouse or a friend with you in the doctor's office to take the notes.