Early signs of labor?

Madeline • 👪❤️
FTM... I'm having terrible back pain today along with diarrhea and nausea. I normally have the opposite of diarrhea. Is this normal? I see my doctor tomorrow morning for an ultrasound. Should I call today or just wait it out? 
My water hasn't broken and I'm not having contractions but my mom didn't have any of that either so it makes me worry a little bit. She said she just got really sick when she went into labor.