Extreme leg/hip/back pain

Hannah
It started today and now I am at a point that I can hardly walk. I had had a few little twinges in my very lower back/hip area that hurt pretty bad, but now I have a constant nearly in bearable ache all on the right side. I can hardly walk now because every step I take knocks the breath out of me. Sends pain all down my leg. Anyone else experinced this?