Normal??

So yesterday I was having terrible back pain and I'm pretty sure I had contractions on and off. I had cramps in my butt cheeks! Not like sciatica pain but like harsh period cramps. I've also been feeling super nauseous , no appetite. I also saw a wet spot in my undies this morning after I went pee. Not sure If my fluid is leaking? I'm 29 weeks is it normal to feel this way?