Sitting with right foot on left leg. went to move leg to get up. felt very sharp calf & knee pain top/side. worsens every day. feels swollen/stiff from inside. limping & constant pain. popping.

Hard to say : Difficult to say but based on your symptoms a meniscal tear is likely. If the pain is worsening you should see an orthopedic surgeon/sports med doctor.

Neuro/vascular: You need evaluation by primary care to determine is it vascular or neurological problem and refer you to specialist.

Get evaluated: See ortho. Can be anything from plantaris rupture to internal derangement including meniscal tears, or articular cartilage injury.