Right side muscles feel swollen and weak

From last year or so I started feeling my right body is bigger, but from last few months , i am feeling my right body muscles are bigger. When i walk for 20 mins, i feel as if my right leg has swollen from inside and right hand also swollen from inside and feel weak, I can punch with power, but it feels big and weak. When i make a fist at that time , I can feel my right fist swollen from inside and is thicker while left is normal. I also have constipation problem but mostly i feels it's stuck in right abdomen it self. Please help doc, I am not able to concentrate because all day I can think of is something bad happening to me. While normal walking as well i am feeling right bigger. I have attached my mri, mostly i feel fatigue all day.left lower back pain is there too. Because of this I am not able to live my life at all.please let me know what can I do , I will do anything to make it right.pls help.spinal mri is normal.bp normal,no sugar,EMG normal,taking b12,vitamin d,CBC,ESR normal.