I fell on my knee at sports training (i jumped up and when i landed my foot was behind me, my shin on the ground and all the weight going towards my joint) as i got up it cracked really loudly and as i run or make any movements stronger than walking it cracks really loud and hurts
You need to get examined by an orthopedic department. You may have either sprained your ligament or may have got small hairline fracture. Which can only be corrected by an orthopedic examination and use of some diagnostics like x-ray and MRI. Kindly visit a nearby orthopedic and get ourself checked. meantime avoid sports training.