This. A million times. Any time I go for a doctor's appointment, I get so nervous that they have to take my blood pressure multiple times because my racing heart is throwing off the results. The fact that one time I fainted at the doctor's doesn't help me get over my fear of it! I also have a fear of blood in general, so getting my blood drawn is a nightmare. As for the dentist, I have a definite fear of going even though I've never had a particularly bad experience there.