How much lightning croch is normal

Monique
Im in my 3rd trimester 27 weeks and 3 days and ive been getting a lot of lightning crotch (sharp striking pains from you pelvis down to your vagina) its not once in a while its 3 times in a row or many time through out the day. Is it normal? Ive also had alot of cramping in my legs like period cramps in the upper half of my legs. Anyone else experience this?