I'm A 66 Year Old Grandmother.Six Years Ago When Teaching

I'm a 66 year old grandmother.Six years ago when teaching my grandson how to do a backward somersault,I did not protect my neck and had a blast of fireworks go off in the back of my neck-head area. I'm feeling a little twinge lately in my neck.Is there anything I can do if I've stretched something too far?I'm worried.