The floaters are a result of heightened awareness, a result of anxiety. They always existed. You just get focused on them instead of ignoring them.

The immediate symptom would be the sense that you had your bell rung, like visual disturbance i.e difficulty focusing, convergence/cross eyed (floaters are not visual disturbance); mental confusion (where am I, who am I, what day is it, etc) and balance. For some, the feeling may be a sense similar to getting punched in the nose (a metallic taste)