Ob-Gyn questions? Ask a gynecologist online.
This is Dr. David
this could be a completely normal uterus for you.
usually uterine cancer will cause uterine bleeding and blood in the uterus.
I would ask for an MRI scan of your pelvis and uterus to see if that can give any more information about your uterus.
that fluid in the uterus could be blood or seroma fluid which can be normal.
let me know if you have questions.