Pain in legs is this serious?

Pain in my legs is this serious? Age: 14 turning 15 in 3 months Height: I'm around 6'1"(I was 5'8-9" at the start of this year) Weight: I'm 74kg, or 163 lbs No allergies or serious injuries in medical history(no fractures or sprains) I'm 14 turning 15 in 2.5 months. I've recently started getting intense pain in the tendons in my knee, shins and ankle. It gotten to the point where I can't run, it's a deep throbbing pain, and it comes and goes quite frequently. There's also this hard bump on the top of my shin bone. Is this something I should be worried about?