Knee pain a month later?

I’d say about a month ago, or possibly a little bit longer, I got a sharp ripping pain in my knee (on a scale of 1-10 the pain was a 7.) It only lasted about thirty seconds but was painful enough for me to have to grab onto something to keep my balance. Afterwards, my knee was fine. Now though it’s starting to hurt more and feels swollen (I also have arthritis in my knees so it could be due to that.)

Should I make a doctors appointment? Is it possible to get pain a month later?