Could this be anything?!

I’ll be 36 weeks Saturday! Iv been having dull cramps in my lower back and hips and now there in my stomach.. also Iv been getting pains in my vagina and Iv had lightning crotch but it feels much different from that lol is this a start or sign of anything?? First time young mom so i don’t know what to expect! Hoping it’s the start of something baby girl has been giving my body such a hard time!