I'm having something similar but it is effecting my whole left side. I have cramping in various places in my upper arm lower arm and left hand on and off. I'm thinking its just a pinched nerve or something. ...I'm trying not to worry too much...but honestly. ....I highly doubt its a dvt.....you haven't worked out recently and you didn't mention anytging about getting an imjiry or bruise on the leg. Plus....I thought that it would be painful. I think you are ok.