Welcome to HCM.
Why you are taking it for 6 months.??There is no any need to take this for long time.
Take plenty of water and other liquids.
You have to go for certain investigations to rule out diagnosis.
Go for CBC,B12,S.calcium,Urine and start multivitamin
medicines under guidance of your physician.If pain persist and increasing with walking then also for Doppler study of leg to rule out deep vein thrombosis
Consult your physician for better guidance and medical management.