blood in my stool

okay my boyfriend wanted me to try a butt plug for the first about 5 days ago we tried and it hurt so we stopped. i then all of a sudden was constipated and when i would wipe i would see blood on the tp. i’ve been having a little bit of stomach cramping but nothing to severe. now there is blood in the toilet water after i poop. the blood is a reddish pinkish color. what could this be?