Normal or not?

I'm sitting at home, completing calling my ob. I have been in pain since last night. Like really bad cramping, my belly gets really hard and it starts at the top or the sides and moves down and to my back. It's not consistent, like every x minutes but frequently. I've drank so much water so I'm not dehydrated. I have taken like 4 hot showers since dinner last night one being at 2 am this morning. Taken tylenol. I have layed down, yoga ball, everything. I dont know if its him switching down because he was breech, if it's normal or if I need to go in. But I dont have anyone to watch my year old and dont want to go unless its neccessary. I literally cant do anything though. I hurt so bad I feel like I'm going to vomit. I have a headache but I checked my BP (its been high since about 20 weeks) and it isnt any higher than normal (138/85). I'm 31 weeks.