Had some pain in my shin after a workout few days ago. Now the pain is gone but have a slight swelling in my calf. Is this shin splints or clot?

DVT/Clot. If you are even slightly concerned about a DVT (deep vein thrombosis) get to an emergency room, cardiologist or Podiatrist IMMEDIATELY. This is a life-threatening problem and must be dealt with immediately. Signs of DVT are swelling (usually only one leg), pain, redness. If you squeeze the calf and it hurts badly, get to a doctor.