Yes, your fracture would still hurt in microgravity. Likely worse.
Pain from a fracture comes from inflammation and soft tissue damage around the fracture, not justas well as mechanical loading of the fracture sitebroken bone. Periosteum (the tough membrane adherent to the surface of the bone and which forms the attachment point of muscles) is highly innervated with pain sensors. It may be ruptured when the bone is fractured, or it may be dissected away from the bone by hemorrhage. Uninjured bones experience no stretching of the periosteum since it is stuck to the rigid bone. Wiggling a fractured bone puts tension on the torn periosteum. Ouch.
Zero gravity may aid immobilization. A well immobilized fracture hurts less, but it still hurts. Don’t ask me how I know.
Acute inflammation hurts less with elevation, but not the orbital kind of elevation. Gravity can aid drainage and reduce swelling, which reduces pain in injured tissues. That's why you put your foot up after an injury. Zero-g means no gravity so you are stuck with the swelling. Swelling puts tension on that pain-sensitive periostium. I think I'd prefer to have my broken leg treated on the ground.