Cramping left calf, please help?

Okay heres the deal. Ive been having random anxiety, and worrying about getting a blood clot and dieing. Ive had this fear in the past and have had numerous dvt dopplers xrays, and blood tests and have never had one. Nofamily history or medical disorders. Im 22 I waitress so im constantly moving arouns. Should I really worry avout this? Also my left calf muscle is laeger than my right. I noticed this a long time ago I think its a half or a cm larger had,it measured once. Just need some help managimg this anxiety.