Thanks for the query to H.C.M. Forum.
Poly Cystic Ovarian Syndrome ( P C O S ) develops pain on right or left groin area depending upon the ovarian cyst
( side). Dysfunctional uterine bleeding
, amenorrhea, scanty menstruation
all are characteristic features of PCOD (s).
As you mentioned that there is foul smelling discharge with pain in back and pelvic area , may be due to Pelvic inflammatory disease
Tiredness is due to infection,
In my opinion consult a Gyanecologist and get his opinion.