Parents won't take me to doctor?

Okay, I have an ear infection & all I want to do is go to the doctor & get some antibiotics or something to get rid of it. I have pretty high pain tolerance so I can deal with the pain, for now, but I want to get some medicine to get rid of it before it gets really bad. My little sister is a hypochondriac, (really she is, one time my uncle had to get tested for prostate cancer & then my sister ran around crying that she had it) they take her to the doctor without saying anything usually. Though for me it's another story, I hardly ever complain of pain & I hate to take medicine unless necessary so if I ask to go to the doctor it's because I really need to go but whenever I ask they always gripe & complain about it & try to put it off until I either scream at them or am on my knees begging to go. Why do they do this to me? I would never do that to my child.