What aremedial gastrocnemius strain symptoms? running yesterday, cramp inside right calf just below knee, feel pull when sleep and tender? advice?

Pain medial calf: Sounds as very well could be medial gastroc strain. Symptoms generally self limited and should improve with time. For now recommend avoid provocative activities (running), gentle stretching as tol, anti-inflammatories, ice, etc. Would fully expect this to improve over a week or so. Unlikely to represent a tear which is extremely painful and associated with significant swelling.