a little help needed!

Ellie
Ladies I am begging for help on this one! 
I am a first time mama and I'm currently 36 weeks pregnant. My bump has went down! I was huge and now nothing! I have had SEVERE back pain for hours now (since 8pm last night) and some mucus has been leaking. I've had cramps an contractions. The contractions are irregular but strong. Baby is low. What on earth should I do?! I'm waiting on a call from my doctor but who knows how long that'll take! Is this labor? Help!!!!!