Is it normal that a week after the fracture, the ribs still hurt, like on the first day? How long should it hurt? How many days does it grow together, on average?

Fractures grow together from a month to three, depending on the place of the fracture, the body's ability to recover. If the immobilization is adequate, it shouldn't hurt. Reduce physical activity.

Each person is different, perhaps you just do not consume enough protein (protein contributes to the growth and strengthening of bones). Eat as much cottage cheese as possible. When I broke my collarbone 2 times, it healed on average for three weeks. But I advise you to go to the emergency room and check everything again.