What happens if you swim in a shocked pool?

I just did by mistake and im fine but I don't advise it, if u did by mistake I guess it's ok

Shocking a pool doesn't necessarily bring up chlorine to a dangerous level. If there were contaminates in the water, such as algae, the chlorine would have immediately gone to work killing the algae, and the chlorine level would drop quite quickly.

Exposure to high levels of chlorine is more of a problem with repeated and long term exposure. If you didn't have any breathing problems from chlorine gassing out of the pool, you probably are fine. The other potential problem is itchy skin from high levels. If you noticed that, showering would have removed the excess chlorine.