Not sure if it’s worth it

I have arthritis in both knees so I’m used to having pain in them. However, about 4-5 months I got a sudden sharp tearing pain in my right knee. I had to grab onto the refrigerator or else I would have fallen. The pain only lasted about thirty seconds, but since than I’ve more pain in that knee. I’m debating to make a doctors appointment, but I’m a little hesitant since I’ve already been to the doctors for my knees and had physical therapy.

Is it possible that my knee could be hurting worse because of that one time, even though it happened many months ago?