37 weeks question

Cara • Expecting our first baby Jan 1st 2016! Married my best friend after 8 years together 10/10/14.
I'm 37 weeks today. Almost 3cm dilated with his head low. I'm a ftm and not sure if I've had contractions. Yesterday morning I had brown color with my mucus plug when I wiped. I just woke up now with chills and feeling like I was going to throw up. I feel nauseous and have a burning feeling in the top of my belly. Is this normal? I'm scared...wondering if it's pregnancy related or I'm just getting sick.