Rock hard belly

Emily
My belly has been rock hard since they gave me the pills to relax my uterus Saturday. It doesn't soften up at all. Has anyone else dealt with this or dealing with it? I asked the nurses since I couldn't get ahold of a dr and they have no clue. They hooked me to the machine and said I wasn't having contractions but I'm not sure how u trust a machine to measure that when the belly stays rock hard... If there's no change in the hardness how can it be reliable?