Max,

Sounds pretty PCS to me.

I think if you had no reason to be on Lexapro prior to your fall I would be reluctant to introduce it to myself this early in recovery.

You haven't been PCS'ey that long, I would be tempted to allow my body to correct itself.

This is strictly my opinion and not a command.

Pay attention to what if any triggers set off your symptoms (bright lights, loud music whatever) and refrain and or limit such things for awhile.

Don't forget to purchase a new helmet, never trust one that was tried out.

Bud