Hi Jo,
Welcome to the forum
Don't worry about the medical, it's only minor open heart surgery to see if there's anything in your heart that worries them (such as illegal contraband) and they chop your arms and legs off to check that in the event that you lose them in an accident they can sew them back on easily enough
Just kidding of course! It's nothing to worry about, just a general checkup to make sure everything is all good.