Sorry you are in pain. I do know that you can have endo tissue migrate to the bowel even after a hysterectomy. A 2 cm simple cyst like that on the ovary is perfectly normal, don't worry. A rectal abcess can be very, very painful. Are they treating you with anything? Steroids or antibiotics? Special diet?
I hope you feel better soon.
after my hysterc. I develoed severe left ovarian pain, took me a year and many trips to er to finally get help , ended up my left ovary was completley engulfed in scar tissue and addheared to the bowel.
scar tissue and endo tissue can do strange things , keep pushing for help until you get it ask for a diagnostic ultrasound mri or a laproscpy.