Generally, I would look back to my initial thoughts when we shut the thing down, and use that as a guide. But, bear in mind that some engines (notably CFM-56) suffer occasional in-flight run-downs/failures for no apparent reason. This might have happened to you. (I still wouldn't relight and carry on to destination, though! - to do so indicates that the thinking is skewed, probably by lack of confidence in the company's management).