Help?!

Ashlee
FTM: I am having intense period like cramps in my lower abdomen and lower back for like the last 2'hours. I've tried changing positions, walking around, hydrating, and am about to go take a warm bath to see if that will help. Of course my OB doesn't have an overnight phone number and I really don't want to go to the hospital for nothing. 
Does this sound like labor pains to anyone else?