Needing some advice ladies. Have had Mirena fitted for 4 years. Have recently had sex and partner had a vasectomy 2 years ago. I have bloated belly and the regular brown spotting I get with the Mirena, nothing else. Not sure if cystitis or pregnancy? Could I get pregnant with Mirena and Vasectomy. I've been to GP and she checked Mirena was in place with threads showing?