concerned😶help

I need help asp. Anyone that has related. Im going to started from the beginning, straight foward. We had sex around 5pm and it was good but ever since we had sex I've been cramping. I've noticed that it's a solid 6 to 7 but I've tried to ignore it just in case it was a Braxton hick(so I haven't go to the hospital) plus so much stuff to get done. I've dranked water all day today around 4 To 5 bottles,walked and when I got home around 8pm I folded cloths, used my yoga ball, and took a nice shower. Before bed I did my nightly stretches and squats(still in slight pain,like a cramp front and back)can't get comfortable, My belly gets hard as well. Can anyone help me. I want to be able to know something before going to the hospital. first pregnancy(a lot of movement through out the day)