Am I AS patient?

I have HLA-B27 tested negative, RA factor negative. But my condition is similar to that of AS. My neck has been completely rigid. Only subtle movement is possible. My back hurts a lot. I sometimes have difficulty in walking due to tingling sensation that makes me shift my body weight sideways and after a prolonged (20-30 minutes) of seating I develop curve shape. It turns back to normal after some movement or after I do some exercise while laying on bed.