An 18 y.o. woman consulted a gynecologist about the pain in the lower part of abdomen, fever up to 37,5°C, considerable mucopurulent discharges from the genital tracts, painful urination. Vaginal examination with mirrors: the urethra is infiltrated, cervix of the uterus is hyperemic, erosive. The uterus is painful, ovaries are painful, thickened; fornixes are free. Bacterioscopy test revealed diplococcus. What diagnosis is the most probable?