I somehow broke Unity.

Hello everybody. I think I gliched out Unity2d. This is how it happened. I tried editing one box collider on my scene. I pressed on one of the nodes on the collider. Then, all values on the collider went to NaN. I tried to fix it but my scene started glitching by creating a huge amount of selection boxes on my scene whenever I clicked. I then knew that something was wrong. I reloaded unity. This happened. Help me.