Mine made me feel like I needed to pee I was in and out of the bed!! That being said you could be having contractions or the baby could of dropped and is pushing on your bladder.
Same as skipper6908, I had bad intestinal cramps as well as menstrual like cramps that made me feel like I couldn't get off the toilet incase something happened!
It made me feel like I had to go to the bathroom but not pee.