Hi, I've been suffering with various symptoms; all of which could be attributed to undiagnosed Chlamydia. I have an IUD (copper, in place for 5 years, valid for 10). I have some mild pelvic pain - intermitent - continuous bloody/ brown discharge. Swabs and a pap were carried out Monday, however I'm worried that it may be an advanced chlamydia infection; even though I tested negative some time ago. What's the likelihood that this test was a false negative?