Loose knee issue

My knee had an ACL reconstruction surgery around 10 years ago. I lost a lot of miniscus too. Lately it's been bothering me. Sometimes when I walk there's pressure on the outer side of the knee. Also, there's a "cracking" or "popping" sound/sensation when stepping. The worst thing in the last couple of months is the knee feels like is coming off and wiggling when. I swing my leg forward while I'm walking. I have to hold off on landing on that leg until I feel it's stable. Anyone know w what the issue might be? I haven't had a traumatic injuries to the knee since. Sorry if my wording is awkward. I'm not sure on many the medical terminologies. Any help/advice would be great.

Go to GP....then hopefully to see a specialist!

I had a meniscus tear and then the femoral condyle ripped off...both knees...many years ago so I had very little cartilage left in the knee.  As it got to be more bone-on-bone and arthritic over the years, I got SynVisc shots.  Very, very successful for a long while.  In January 2016, went to my ortho with increasing pain.  X-ray revealed that there was nothing else he could do with another scope and that more SynVisc or cortisone would only delay the inevitable TKR.  Done that March.  Maybe the SynVisc would work your you...at least temporarily.