Meaux, you need to see the doctor. The knee pain might be the seat position, or it might be that you tore something in the knee and you need surgery. The pain on the right, that sounds exactly like sciatica. However, sciatica is typically caused by a ruptured disk or two in the lower back that causes the sciatic nerve cluster to get inflamed. The sciatic nerve clusters are located on the upper part of each buttock. You need to see the doctor so that a determination can be made on whether you need x-rays and MRIs. Disks in the back can be ruptured easily, as easily as turning over in your sleep and twisting your back in the wrong way. Or it might be something else. Whatever it all is, you need to see your doctor.