Hi. Really need some advise. It’s been around 18 months since my ACL surgery and I have had no problem until this weekend. I suddenly have pain in my knee, I can’t put weight on it as it’s painful and I can’t straighten. Do you think I may have damaged the ACL again?
Did anything happen that could have caused this change?
not that I can think of
I think it’s very unlikely that you tore your ACL is nothing happened. 
can you get a pt to look at it?
Thank you. I’m going to see the consultant. Thank you so much