<s>[INST] I have had 4 instances where I felt a very sharp pain on the left side of my heart/breast area and I have been experiencing severe swelling in my right leg. I am on Lasix but it is not taking care of the situation. I had a heart doctor do a ECO test on me and a stress test. I do suffer from panic attacks but that was not it at all. I have even developed water blisters from the extreme swelling (right leg only, rarely left). Help! [/INST] If lasix is not helping and there is severe swelling of right leg. Get USG Doppler of right lower limb to rule out thrombus in vein or artery or some mass effect causing obstruction. </s>