They've poked and prodded and looked down and up and even done a virtual spiral slicing (CAT scan) and they can't find anything definitive for the blood loss; so they've taken her off the coumadin and put her on coated low dose aspirin and will be sending a remote camera in for a look some time next week.
While she was in the hospital she also got several breathing treatments and was on lasix.
I guess time will tell...
Thanks for all the well wishes!
I passed them on and she appreciates them, too.