Weakness in leg after being fell on

My grandma got out of her car and fell and I jumped behind her to catch her but she’s heavy so we both fell and I cushioned her. Tbh I really don’t know in what way she fell on me or what happened to ME because we fell on top of these metal things and I was so concerned that she had cut herself on them that I pulled myself out from her just to look at her hands and face to make sure she didn’t cut herself.

She’s fine but when I walk now my leg shakes. It’s not hurting it’s just really weak, feels like it’s about to give out especially if I squat or bend down on it.

Should I be concerned about that or should I give it a little bit (this happened about 30 mins ago)

And my grandma is completely fine. I cushioned her fall like I said.