Been having slight pain on the left side of my pelvic area for the past 4 days. I was hopeful that it may be implantation so today I bought a test since AF is due in 3 days. Literally 1 minute after taking the test it seems like AF comes. So of course the test is negative and I'm bummed out. However, I didn't have normal AF symptoms and not to be gross, but it's brown! Should I take another test of is my mind playing tricks on me???