Anxiety makes you over-analyze your body in fear thinking that every twitch, ouch, burning etc is a frightening symptom which makes you even more anxious and search even more, so it is possible that none of these symptoms really exist other than in a minor way that they always did. Anyone can feel these symptoms if they look for them - I just woke up from an afternoon nap which I hate to do but could tell myself now that there is something wrong because i am overly tired, when the reality is I should have slept more last night.
Only your doctor can figure out if they are real and I assume you have already investigated this possibility with him? Or they could be real and he is mis-diagnosing them, but no one here can diagnose you so you would have to take it up with a new doctor.