You are 14 years old. Where are your parents? Shouldn't you be addressing your medical concerns to them? It is their responsibility to take you to the doctor. Kindly remind them of the fact they need to take care of your medical needs, there are laws against child endangerment and neglect.
We are not doctors here, I am sorry to say. Please, go see a Dr. Have blood work done. Only then can you start to heal from whatever it is.