How frustrating!

Have you tried moogoo? Nice and gentle and natural.

In addition to checking out the stuff to do with more serious possibilities, just to be on the safe side, I recommend having a not too hot shower and then slathering on some moogoo. Particularly after the pool - have a sluice shower and moisturise before going so the chlorine doesn't sit on your skin.

With the tingling stuff, I've been told to do a wall sit for a while, to try to wear out the legs and get the last of those niggly wriggles out. Not sure if that fits here, but worth a shot?