Dear Nick Carcione:
Your symptoms sound like you might have some irriatated nerve(s) in your back (radiation pain down your leg). I would see a neurologist and have him/her examine it to verify that it is your back. The pain when you bend your let doesn't sound like a back problem, it sounds more like a mechanical problem around the knee area, but without examining you I can't tell. I would see a neurologist, find out where the problems exists and then begin to figure out the best plan to relieve the back pain.
Sincerely,
CCF Neuro MD
Just the description of pain, doesn't help to give you a diagnosis. Since it does not radiate, it may just be mechanical. I would see your family physician.
CCF Neuro MD