thanks for query
If i am not wrong by lupus
you mean SLE.So it means you have been diagnosed with SLE with RA.That makes it very interesting because traditional wisdom in rheumatology says SLE and RA are mutually exclusive diseases which means you cant have both of them at same time.Neverthless development of SLE like features have been described in RA and it is associated with increased mortality.This raises some question in your case and you should discuss with your doctor
Which criteria was used to diagnose RA?was it older 1987 criteria?Is your lupus severe? has kidney biopsy
been done?The most common cause of abrupt cesssation of menses in SLE patient would be cyclophosphamide
treatment. So have you taken it? You are taking hydroxychloroquine
which is not likely to cause delayed period. do you know it cab be teratogen?
I have tried my best to help you