I have knee, calf and foot pain with no trauma or injury to my leg. onset was sudde my leg feels heavy as if i were wearing ankle weights.

A sudden onset: of pain in the leg, especially in the calf region should be checked out immediately! I recommend getting seen by your doctor so an exam can be done and the correct treatment given.

Immediate Care....: You might be a great candidate for the formation of a clot in your leg. No injury is needed and the symptoms can vary. Whenever the calf is involved, your safest bet is to have it checked out asap. A failure to identify and treat this possibility could be disastrous.