The tingling in the extremities is a common occurrence in spinal cord injury. My hands and feet tingle a lot.

The fact that your feet tingle, when you look up, makes me suspect that you have some damage in your neck. If I look up, it puts extra pressure on the nerves, triggering body tingling and severe headache. You really should have your neck examined thoroughly.

Don't ignore your floaters. As you had a fall, you should ask your eye doctor to check for any signs of retinal detachment. Hopefully, as Mark said, they're just a product of TBI anxiety. However, retinal detachment isn't uncommon in people who sustain their brain injury from car accidents, falls, and other traumas.