In your exams - You will come across times when you will have to diagnose a difficult condition, which will be confusing. But even in that time - You will have a spinal thought about a diagnosis, which you cannot answer why, but still you will have the instinct that yes it's the diagnosis. 

Go ahead with it.  It's not a guess, it's your natural response to any complex situation with the data you mind knows, it's a gift to all mammals. 

Instinct is inborn and is hardly goes wrong !! Believe in yourself. And remember instinct is so powerful, use it in every aspect of your life - If you feel like doing it do it ! (like for example comment on this post - good morning). It made you smile isn't that's the whole motive :) 

A very good morning.