Acl Tear?

Having my ortho appointment on Monday but want opinions from others. I was doing tumbling during cheer and landed wrong doing my one handed cartwheel. There was distinct popping/cracking sound and I lost complete control of my knee/not able to walk for a couple minutes after. It has been 4 days sense and I cannot fully straighten or bend my knee, it’s locked in a slightly bent position. I have tweaked it 2 times sense and went straight to the floor in horrible pain. I can walk and bear weight with minimal pain but have very little stability.