My Sister Died Almost A Month Ago At The Age

My sister died almost a month ago at the age of 47 in her sleep.. Autopsy haven't came back yet but she had foam coming out of her mouth and she had peed on herself...she had blood pressure but nothing serious and she had never been hospitalized it was just sudden.... I knew she would take ibuprofen and pain pills like Tylenol and it's puzzling me now