I am having a fluttering bubbling feeling in my calves - mostly right one and sometimes lower left inside. I am worried it is a blood clot or something terrible. Symptoms have shown up for the last month or so maybe 2. I jog 2 miles, three times a week. I smoke a pack a day. I currently take high blood pressure medication (low dose) and fluid pill. It is a weird feeling like I can feel something twitching in there. It is basically a twitchy, bubbling, fluttery feeling in calves. Can you advise please?