Your first visit?
Then I would suggest to make a list of all ailments bothering you, even or especially little things like, let say: mouth ulcers, sensation of stone in the throat, sweating on the forehead, cold tummy, all those things which seems irrelevant but very often confirm a diagnosis in Chinese medicine.
Needles? no worries, you might feel a little prick during insertion but nothing like giving a blood sample at the hospital. After that you feel very relaxed on the bed. This sensation lasts for a while, couple of days up to a few weeks.