I HAVE BEEN IRREGULAR AS FAR AS MY PERIODS. I HAVE NOT HAD A PERIOD SINCE LAST SEPTEMBER WHICH IS 11 MONTHS AGO. I STARTED SPOTTING ON SATURDAY AND TODAY IS DAY 4. I TOOK A PREGNANCY TEST AND IT WAS NEGATIVE. I AM NOT SURE WHAT IS GOING ON. I AM WORRIED. I READ ABOUT ENDOMETROSIS AND I HAVE ALSO READ ABOUT SOME OTHER UNPLEASANT THINGS AND NOW I AM CONCERNED THAT SOMETHING IS NOT RIGHT.