Braxton Hicks?

So at work earlier I started experiencing alittle bit of pain in my back, hips and lower abdomen. I figured it was Braxton Hicks and it stopped for a bit. After I clocked out I sat down and I started hurting again but more on one side and it let up a bit, when I stood up the pain got worse. Sat down for a bit longer, once I got home the pain was so bad it hurt to walk. At the moment I still feel the pain but it’s all to one side now, it feels better when I sit but when I get up it starts again. What should I do? I really don’t want to go urgent care. I’m hoping all of this is just really bad gas that can’t escape even though it’s never hurt this bad.