I have a weird leg cramp that's worse tonight - - should I worry? It's keeping me up :-(!? It feels vaguely circulatory. I first noticed it sitting in a lecture in a cramped desk a couple weeks ago - - - since then it s come and gone - - not major pain really but it feels vaguely circulatory, like a kink in a hose. Tonight it s annoying the crap out of me. I am in my 20s and pretty overweight , but have no other hallmark signs of DVT or anything...should I worry? If so, how soon should I see a doctor? Oh, I should mention it s just behind my right knee , at the joint.