I'm 63 Yrs Old. When I Was Crossing The Street

I'm 63 yrs old. When I was crossing the street I felt a pull/snap in my left calf and i was not able to walk without bending the leg. I equate what I felt to when I see a football player running and then stops and grabs the ham string. My question is : short of an MRI is there another test to determine if I teared a muscle or tendon?
Thank you
Jairo