What Causes Numbness And Tingling In Leg With History Of Blood Clot?

sure I have numbness, tingling, ( especially ) in lower part of my right leg and foot area and sometimes in left one and get cold easily. I just had a bone scan done and results will not be back to me until Jan 5. I have had a Blood Clot in right leg back in 2010 and traveled to my right lung before. Should I just sit back and not worry about it ?? or what ....I have had a triple by-pass in 2008