Was severs disease a misdiagnosis?

i am 13 and i have had severs since i was 8. my doctor said wear supportive shoes, advil, streching, etc. it went away maybe when i was about 10 but not for long. when i wear tennis-shoes, it helps for a while but not enough that it matters. my heels always feel hot on the inside, achy, painful, and they hurt pretty much all the time. my knees also hurt and my ankles, but not as severely. do you think that this is severs? or something else?