Butt leaking poop?! Help! TMI

Ok so this is really gross but I don't know what to do. I'm 25 weeks and lately I've noticed that I always have a little bit of poop on my underwear and when I wipe there's always poop, even if I haven't had a bowel movement in awhile and even if I've showered since my last bowel movement. I wash really good when I shower so I know it's just not leftover and me being unclean. Is this normal during pregnancy?? Has anyone had this? What should I do???!