My Feet Feel Achy And Weak Right After I Ejaculate

My feet feel achy and weak right after i ejaculate also if i sit there after feeling flushed my whole body feels weak I bend my feet and they shake/twitch with true weakness to where i want to laugh and could barely move them the sole area is where they twitch

I know the feet and the genital area are connected but what can i do to never feel weak after ejaculation