Advice Please!!

A little history. I have PCOS, IBS, and had a faint positive pregnancy test and am waiting for the results of the blood test. if it is positive I will be about 5 weeks. The last 3 days I have had this terrible stabbing pain in my lower left side. At first it was just when I made sudden movements, then it became when I walked too much, now it's just kind of constant. It gets worse when I walk. It's never bad enough to bring me to tears or anything, I'd say at its worse my pain is probably a 5. Has anyone ever experienced this? Should I wait it out until Monday to call my Dr, go to the er tonight, or maybe try urgent care tomorrow?