I can't tell if I'm having Braxton Hicks contractions or regular contractions? I don't feel pain in my back or lower abdomen except really lightly but my stomach tightens up so tight it hurts, not only that I get really nauseated. They keep showing up all night but going away for a little while, not only that but I've felt very little movement from my baby. They don't go away when lay on my side or drink water and I get tired with them. What is it?