I am probably just going crazy, but I need some reassurance. I inserted my nuvaring 4 hours late last month, and then had sex 4 days later and he came inside of me. I had regular bleeding when it was time for my period, but I still felt like I was pregnant. I got negative pregnancy tests 12 and 20 days after the first day of my period, but I am still scared. I have constipation and lower back pain, but those are the only symptoms. Please help!