Consistent and timeable contractions, your water breaking,
vomiting, diarhia... are the cramps you are feeling timable? Like do they happen every 10 minutes, or 6 minutes, ext. Are they so painful/intense you have a hard time concentrating? You may just be dehydrated or over working yourself. Relax, take a bath, if they haven't eased in a few hours reevaluate the points I made.