Would depend upon the curvature. My son-in-laws sister had to have surgery to correct her curvature because it was obstructing her breathing, but she was not diagnosed with sleep apnea to the best of my knowledge.
Are you under a doctor's care. Many people will have some curvature as they age, so depending upon your age, the degree of curvature, etc. will depend how your health is affected.
I was in an automobile accident back in 1996 and it started out as a cervical strain...has gotten worse over the years. I have be diagnosed with degenerative disk disease and a herniated disk, also have spurs.