Suggest Cause And Remedy For Bruising On The Buttocks

Good morning,
I am a 43 year old women, 5’5 and 135 lbs. I have been having trouble with my bowels for a while which included a visit to the ER. I was impacted and they gave me Lactulose and an enema and eventually I passed a lot of stool. Since that day I have not been regular at all. I have restructured my diet and thing have gone bad to worse.
I do have a history of disc bulging/herniation in my low back and neck.
This morning my 7 year old daughter walked in my bedroom as I was changing and she gasped “mummy what happened to you bum”? I was confused by her sense of alarm and went to the bathroom and saw that I had bilateral bruising on my buttocks.
The day before I had severe stomach pain and was able to eliminate a large amount of stool with digital stimulation. Then unexpectedly, with force a very large and painful amount of stool came out. I have had nausea and vomiting most of this time and now I am running a fever. I have a very tender abdomen above the belly button.
Any help you can offer would be greatly appreciated. I am very worried about this bruising. I never ever seen this before on me or heard of it.
Sincerely,
Lisa