Suggest Treatment For Cuboid Bone Fracture

Hello... I am a 40yo Female in early menopause, about 150lbs and 5 foot 2 inches. I fractured my right cuboid bone on February 22, however I did not know it was fractured until I saw a orthopedic surgeon and had x-rays ( where the fracture did not show) and an MRI done on March 3rd (where the fracture did show). At that time I went into the big black boot and on crutches until May 5th. At that point I came off the crutches and the weaned out of the boot. I had a repeat MRI done due to continued pain in the foot on May 31, when I returned to the Dr. on the 2nd of June he told me the fracture was only partly healed and I should wear the boot or sneakers for the next for weeks. The foot is still very painful and I am worried about the fracture is still present. I am an RN at a NICU working 12-13 hour days and concerned about returning to work. How long does it usually take for these fractures to heal ? What is the next step ?