What Causes Stomach Bruising And Vaginal Bleeding After Hysterectomy 8 Years Ago?

Hi. I don't drink often but had a party on Friday night. During the late hours i had a bleed on the loo but ive had a full hysterectomy 8 years ago so don't know why. When i woke and throughout the weekend my lower stomach feels really bruised but i definently didn't have any trauma.