If you’re looking it up it’s spelled “Rouleaux formation” of red blood cells.
It is very common, benign, and I have seen it hundreds of times under the microscope. Completely meaningless.
But, panic if you must.
My mother is in the hospital with something wrong with her blood. Dr. refuses to call me. Nurse is very vague. Mother’s doctor back in Jan. said there was nothing wrong with her. She hasn’t been on any meds or even baby aspirin. She was jabbed in April and now this.