@ysmina-- Yes, I fractured mine around the same time you did and received the same treatment- a lot of rest and pain killers. I was in major pain for the first six months or so but it slowly subsided. I've been basically pain free for the past year.
I wonder if there is something else going on with your sacrum? Did you get a follow up MRI or x-ray to see how it's doing? That might be a good idea. As far as I know, healing time can be longer for those with weaker bones due to osteoporosis. If you have osteoporosis, it might be why you are still in pain.
Your fracture could still be healing or the healing might have not completed. You might be able to get surgery to bind the fractured parts together for sacrum support if that's the case.