Labor?

I'm almost 37 weeks and started getting really bad contractions last night, I couldn't walk and I would have sharp sharp back pains that would come and go. This morning I woke up and just felt really weak, I feel really really dizzy. This is my first so I don't really know how to explain, I just don't feel too good. My water hasn't broke or anything but there are times where I would leak white stuff from my vagina, I don't know what it is. Can these be signs of going into labor? I really don't know and I don't know how to explain these pains either. Can someone please help?