Had back pains and stomach tightening that came and went since about 12 am.. around 4 am they gots…

Had back pains and stomach tightening that came and went since about 12 am.. around 4 am they gots stronger now around 630 I feel like my back and lower stomach are being torn apart. I'm not sure if it's the start of labor.. but its constant and hurts so damn bad I keep going to the bathroom because I have so much pressure down there minus peeing some nothing is going on