My Knee Feels Swollen, But Doesn't Appear So. I've Had No Apparent Injury And There Is Really No Pain, It Just Feels Really Tight And Uncomfortable. I Am Overweight, Have Been For Sometime. It Started 2 Weeks Ago And Now Seems Somewhat Worse. What To Do?

You need to see your Dr. You could be retaining fluid which is not healthy,if you can press with your finger and leave a indentation  you are retaining fluid see your Dr. About this as the fluid can build up and go to the heart and cause serious medical issues.....good luck