Cramps......

Late Saturday night I couldn't sleep due to period type cramping along with hardening of my stomach. All day Sunday the cramps and hardening were on and off. Now I just got off the couch and my stomach hardened and I got cramps that I could feel in my thighs and lower back and stomach. Is this Braxton hicks? Or does it sound like actual contractions? I'm only 35 weeks and obviously I don't want baby to come just yet. Does anyone else have any experience with this?