this may seem like the most obvious question, but what exactly is a "physical"?? and is it normal to have one for people in their 20's or do GP's usually just give one if they feel they have a reason to? I just switched GP's and this one knows about my ed and she said something about checking my heart and BP and electrolytes etc... I'm dreading going, she seems really nice, but I hate going to doctors in general... and I am scared. I'm kind of telling myself that everything will be fine, but do you think that's really realistic? I am SO worried.