Should I go in?

Last night I was having contractions I think. It was horrible back pain that kept coming and going is the only way ik how to describe it. I timed 1 it was about 15 minutes apart. I went ahead and slept. I woke up this morning in the middle of one of those pains that I believe could be contractions. I also feel leaking like when your on you period but that could just be discharge not 100% sure if it's my water. I'm 35+4 weeks