Should I get second opinion.

[TDW4255]

Left knee pain for 7 weeks after twisting to sit 12 pack of pop down. Felt a pop in knee didnt hurt until I walked upstairs. Lateral knee pain and after walking awhile the back of knee hurts. Pain worst when bend knee or go up and down stairs. Pain always there just worst when bend it. Pain has woke me up at night if sleep with knee bent. Xray snd MRI normal so orthopedic said PT and if pain continues come back in a month. PT has me in tears. Should I get second opinion could MRI been read wrong. Help me i feel crazy and feel that the pain is in my head.