A 18 y.o. woman consulted a gynecologist with complaints of the pain in the lower part of the abdomen, fever up to 37,5°C, considerable mucopurulent discharges from the genital tract, colic during urinating. After mirror and vagina examination the results are the following: the urethra is infiltrated, cervix of the uterus is hyperemic, erosive. The uterus is painful, ovaries are painful, thickened, free. Bacterioscopy test showed diplococcus. What diagnosis is the most probable?