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.