i have just gotten a mono slab poured on last sat. and have noticed today that i already have 3 cracks and not in the expansion joints like they were supposed to be. they are coming from the very edge where it is over 16inches deep and has 2 rebar in them. if this was to happen after the winter time and spring thaw that would be one thing, but it sure aint winter and not spring time either.. they are ranginging from 3 to 6 ft long already any opinions would be appreciated...to me this is just alittel to soon what would you do????