Pulled muscles from the fall

I'm still debating what happened and since my knee is feeling weak. I'm thinking it finally buckled on me and thrrw me in the floor. Imma discuss it next Dr's visit. see if we need images or what I've had knees ate up with arthritis for over 20 years now the Dr had said they don't see how I manage to overcome it without a cane. but I do... it's the grace of the Lord. I'll post more later but have to have my noonsiesta#