How Can Calf Muscle Tightness With Foot And Calf Numbness Be Treated?

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Doctor,
Approximately 6 weeks ago I pulled a ham string on my right leg. This started from my right back side cheek. I have attempted to stretch my keg muscle; however,my right calf muscle is very tight and now my right foot and right calf are somewhat numb. I saw a Dr. in Singapore and he prescibed a pain and muscle relaxent. He also recommended an MRI.
Howver, I am concerned with the stiffness, numbness and some difficulty in walking.
My personal email is:
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Thank You.
Norman Medina
+65 9150 5125