I think I should also say that I have no visible rash on my skin, and im only 16 years old.
Hello,
Without examination ,confirming a diagnosis is tough but various possibilities are there for your symptoms.They are arthritis,chronic fatigue syndrome,dermatomyositis,erythema multiforme,idiopathic hypereosinophilic syndrome,polyarteritis nodosa,rocky mountain spotted fever,stevens Johnson syndrome and infectious diseases.
I sincerely advise you to consult a physician as without examination ,confirming a diagnosis is tough.Various investigations are needed to confirm a diagnosis and treatment is diagnosis specific.Till that time,you can take antipyretic like acetaminophen(Tylenol) and anti-inflammatory like ibuprofen.For the itching,pls take over the counter antihistaminic like benadryl or Claritin.
Hope it helps.Take care and pls do keep me posted on how you are doing.