I still have lot of pain and back stiffness weeks after a fracture. What to do?

Hi doctor,

I am a 30 year old female. I fractured my pelvis in a car accident on the 7th. I was on crutches for six weeks and am now walking the past few weeks without. The fracture was a tiny hairline fracture of the sacrum and another two hairline fractures on the side towards the hip. No fractures were in the joints and I was able to heal with no surgery. The problem is that I am still getting a lot of pain which alternates from the front round to the lower back, with the back pain being the worst as it is so stiff I am finding it very hard to walk. I also get numbness and tingling in my right lower leg and foot specifically at night which sometimes stops me sleeping. I am very worried this pain and stiffness are going to stay with me now specifically the back pain and stiffness. I was told I would make a full recovery although I do remember one of the many doctors briefly saying I could get lasting back pain in the sacrum even though it was so fine it could not be seen on the X-ray. I have been taking up swimming twice a week. I am not back at work yet.