When should I go to the doctor?

I’m 33 weeks pregnant and have been experiencing period like cramps for 3 days at least maybe 4. The pain isn’t unbearable but it’s uncomfortable enough I don’t really want to do anything. It’s on both my left and right side and occasionally in the middle. It’s uncomfortable to sleep I have to rotate and that doesn’t help all of the time.. my doctor’s office is closed so I would have to go to the hospital but I’m not sure if it’s just ligament pain or growing pains and if going is necessary.