If it is only three metacarpal fractured, it usually keeps on improving with time, may be up to 6 months. But often, so many metatarsal fractures together are associated with forefoot dislocation. Your doctor has to carefully look at the x-ray, and if necessary reconfirm on CT scan. I have seen some of these cases, who did not improve, and were finally diagnosed as forefoot subluxations. This is just a thought, you may like to share with your treating doctor.