I feel like I'm having contractions. I'm not sure. I'm having pain in my lower back and lower…

I feel like I'm having contractions. I'm not sure. I'm having pain in my lower back and lower abdominal area. And It comes and goes. It's not to painful. But I do feel discomfort and pain. Should go to the hospital? I have a doctors appointment Tom. Not sure if I should just go to the hospital or wait till tomorrow.