I am 72 yrs old,with lot of health problems-HTN,DM,CAD,Stentsx2,on plavix, ASA,Gout from monday 11/21--i stated having pain to behind rt knee area,by 11/23--wednesday could not walk,went to primary, gave pain med,US doppler negative for DVT,Popiteal cyst, saw ortho,did X-rays negative, he said,pulled muscle ,but has swelling to leg and pain still persists, any thing else going onmav