Contractions or diarrhea?

36.5 not a caffeine drinker but drank 2 cups of coffee yesterday because I was really backed up. Had back nausea/cramps for HOURS and of course it cleaned me out like I knew it would. But all throughout the night I would wake up to bad cramps and and a hard stomach and I would try and use the restroom but only a very small amount would come out (I was VERY cleaned out well before bedtime 😳) I woke up probably 5-6 times between 5am and 12pm due to this. What's that chance that these are real contractions? I'm about to go on my daily 3 mile walk hoping they become timeable.