1wk after a severe ankle sprain, still swollen and bruised. Skin is tender and feels like burning. Cracks appeared bellow the swelled area. Normal?

Have it evaluated. Pain may last a long time following a foot or ankle injury. An x-ray can show if there is an underlying fracture. You may have a soft tissue injury if it is just a sprain and may have damaged the muscle, tendon, or ligaments in the area. Have it evaluated by a professional and get the appropriate treatment.
No. I would not call this normal. You should see a podiatrist for evaluation.