Sharp pains? FTM unsure.

Jacqueline
I'm 35-36 weeks & I was checked yesterday & I was 1cm dilated & I've been having some pains on & off it feels like it's inside my vagina & I talked to the doctor & she said that is okay. Well today I've had sharper pains maybe more around where cramps would be maybe a little lower. They happened like 3 times since 1:45pm. does anyone know what it could be? Should I be worried? The baby is still moving & everything else seems good, I'm just drinking some water & laying down now but it's happend when I was laying down too. Any advice, suggestions, anyone know anything? Please & thank you!