Hello doctor-- I am 21 years old, and married. Ive have rhematoid arthritis since I was 15, but am only on 800mg of advil twice a day currently. My period has never been the most regular, but I ve never been more then a few days to a week late. I have not had my period in over three months now, and an at home pregnancy tests show up as negative. Is this common with JRA? We are also worried about infertility.