I'm trying to get into a rheumatologist too, the only one in the town where I am has 'closed her books' until after easter. My GP called to try and convince her into taking me on as a special favour... apparently she dithered, then asked for a whole host of blood and urine tests. When she gets the results she'll decide if she will see me. I'm not sure if having complicated results means she'll be interested and see me, or if having a straightforward case means she knows I won't be too difficult!
Before you diagnose yourself with depression or low self-esteem, first make sure that you are not, in fact, just surrounded by a-holes.