I fell over whole ice skating and my knee is so bryosef it's unbelievable and really hurts what should i do ?

See a doctor : There are many structures inside your knee which can be injured in a fall. Go see your doctor or emergency department for a physical exam and Xray to exclude a fracture. If there is no fracture, there could still be significant injury inside, such as an ACL tear or meniscus tear. These can be seen with MRI.

Evaluation: An acute injury like that needs to be evaluated. Knees are tricky and can have a lot of injuries in the tendons, ligaments, menisci etc. Go have an x-ray and an evaluation. Then, Rest, Ice,Compression and Antiinflammatories (ibuprofen, naproxen)