Heard a pop sound while running

My story: (complete tear)
Heard a pop sound while running( I stopped suddenly and tried to turn back) collapsed on the ground due to some pain.

After 5 mins i was able to get up and walk with some inconsistentcy. I didn’t stopped daily activities other than running fast. Many of my friends expected swelling but i didn’t felt any swelling but pain while walking. I bought a knee brace which helped me while walking. I did exercises. I thought of returning the knee brace in the store as I don’t feel much pain after 3/4 days.

2 weeks later I visited doctor. X-ray seems to be fine. Doctor tested my knee and expected a partial acl tear and meniscus tear. Got the MRI done at the end of third week. Result is a complete ACL tear. really schocked and confused that a small injury (as pain is not so high and i didn’t used any tablets) leads to ACL tear.:relieved:

This group is giving me a good emotional strength. The responses to the posts and replies to the comments are awesome.