anyone else have contractions that give you pressure

in your ass and make you feel like you have to poop but once the contraction stops you feel fine ?

baby’s engaged and i’ve been in early labour for about 2 weeks but my contractions have turned into period cramps and lower back ache and every now and then when they come i feel so much pressure in my ass but once they stop the pressure is gone 😪

is this normal ? i didn’t have this with my first