I'm a breastfeeding mom. when i look down at nursing baby i feel a sharp pain in neck that shots up the back of my head. what ciukd cause this?

Irritated nerve?: If there is pain, tingling, numbness, or electrical sensations felt when a person moves her head or neck in a particular direction, she may be irritating or compressing a nerve coming out of the spinal cord. A neurologist or a physiatrist (physical medicine and rehabilitation) doctor can figure out the problem and start therapy. Sometimes neck x-rays and / or MRI are needed.