Missed my period by 3 wks and I'm having pain in my right side and upper inner thigh area and I had a brownish discharge three days before I expected my period but my tubes are tied for six years I took test but it was negative?

Need evaluation. Pregnancy remains unlikely after tubal ligation. However, ovarian cyst formation and/or rupture could still be a possibility, as well as possibly other ovarian problems. Kidney or bladder issues also a possibility. This requires evaluation by medical professional. Suggest Urgent Care visit or office visit to your doctor today. At a minimum, speak with your doctor's office today to get their advice.