hello i read your question and understand your concern i would like to ask that * your age * marital status * why you went for this usg * any lower abdominal pain/discharge any fever? * history of mennorhagia (excessive menstruation) according to your USG your uterus in normal in size and position but you are having multiple of small fibroid s in your uterus and endometrium is thick that is more than normal,and fluid collection posterior to uterus with adhesions indicating PID pelvic inflammatory disease so i would suggest to go to your gyno and show your usg to her and get treated i hope my answer will satisfy you good luck & tc