don't be offended when i say this but you sound like you are a hypercondriac! And with the net being able to provide all sorts diagnosis' at a click of a button it's easy to think you've got something major when you haven't. I bet you've read some about kidney infections, etc and it's made you paranoid.
For starters, if you had a kidney stone or a cyst in your kidney then you'd be in real bad pain! but in regards to getting sick, puffy eyebags, etc... You sound like you need to change your lifestyle. Incorporate a bit of excercise maybe, a healthier diet, some multi vitamins (to help boost your immune system) and some proper sleep rather than reading about possible health problems late at night.
But I suggest that you should just go to the doctor. He or she will probably test your urine and see if there are traces of blood in your urine or send it for analysis. Young people very rarely get kidney problems at your age.