Peeing a lot, but not drinking a lot of liquids.

Today, I've been peeing a lot more. Which is weird, because I'm not drinking a lot of liquids. I've actually barely drank anything today, but I'm also not thristy at all. Its not that I'm peeing more times, its that my bladder is full, full like I've been drinking thru out the day(which i haven't). Has anyone else had this happen? This morning I also did wake up nauseous, and have been nauseous throughout the day. And have been having on and off cramps for a couple of days.