Pain @ 30 weeks

Jocelyn
I've been having a stabbing pain since last night in my lower abdomen and at the same time my whole tummy gets stiff/tense. Didnt go to the hospital because i thought it would be something normal since im not bleeding/Spotting. They pain is consistent for an hour and will go away, then come back after 2 hours or so??!! 
At this point I'm very worried since around 10 am these got intense. I sent doctors a message waiting for response?! 
Should I go to the hospital???