unpocoloco

Hi, I began taking Kenpo in June. I've been wearing a cup since July (smart move, I'm sure!) It is a full jock strap with cup included, brand is "Pro Force." However, even with the cup, a low blow still feels devastasting. Not quite the level of "I'm going to throw up," but the level of "I can't move, and will never walk again." (There is a fine distinction, I believe) Is this normal? If not, what should I do about it? Thanks, El Loco