I Am 65 Years Old. Last 10th February, 2016 I

I am 65 years old. last 10th February, 2016 I had an angioplasty(PTCA with Stenting of LAD 3.5x48 mm-DES) and now having medicines like (a)Clopitab 75 mg 2 times (b)Ecosprin 150- after lunch (c) Cytogard OD 60 at 8 p.m. & (d) Lipicure 80 before dinner.
Recently I am having a knee pain on all over the right leg which prevents me to a tight sleep. I am always to straighten my leg lest the pain can not be bearable. please advise.