Right, so I was on my period about 2 weeks ago, and now have suddenly come on again! I am sexually active, but I have the implant. I also started getting lower back pain, a warm feeling in my uterus, and have had bad nausea for 5 days now! The doctors thought it was a UTI, so tested my urine for that, but it came back completely clear, no infection in sight. They don't know what else it can be, and told me to just wait for it to pass. Is there any possibility of me being pregnant?