Please give me advice!!
I am 27 years old. I feel pain in my leg(below the knee joint muscle)for 1 year already especially when i use stair case, i feel more painful. Then i went to see the doctor and she asked me to do blood test.That time My ASO is 320. She precribed Dicolfenac injection. i got 2 times injected. then after i did the ASO blood test and it become 150. Now she asked me take "Phenoxymethylpenicillin potassium 250mg" for 4 times a day. After taking 4 days of that medicine, i feel so tired, bodyache, shaking my hand and i can't get sound sleep at night. should i continue to take this medicine. please advise.

Thank you so much.