Braxton hicks or preterm labor?

About Saturday evening I started getting what I thought were cramps. Like they felt like period cramps and would tighten up for about 9/10 minutes and throb. Then go away and then come back. I haven't felt him move since Sunday afternoon and the cramps are getting closer together and now I have a slightly pink discharge. I'm 23 weeks could I be in really early preterm labor?