When you saw the figure standing by your bed for the first time what did you do?
Did this happen every night ? Did it happen at the same time or close to the same time when it happened.
Does it seem to be exactly the same now as is was at first?
I agree with HH that you should talk to your wife about this and see if there are "notes to compare " you haven't talked to each other about. Communication helps strengthen relationships and the bonds we share with others by demonstrating your faith in them that allows you to share things you do not share with others.
I know paranormal events happen worldwide on an everyday basis.
I am a believer in looking into every possibility I can reasonably find before I make up my mind about what it may or may not be and how I intend to react to it.
Recon before you invade , know what you need to overcome and do you need to adapt , to paraphrase some Marine teaching to the best of my limited knowledge of Marine training.
A clergyman with experience in these matters can be invaluable as HH points out, and may be the only effective action against a demonic presence if
it is determined that is what it is.
HH and the good Padre and myself may see things somewhat differently but I would trust all I have to either one of them with no hesitation . They both are intelligent , aware and worthy being trusted.
I encourage you to check the information in this link also Sleep paralysis - Wikipedia, the free encyclopedia
it may give you some perspectives to consider or not. Only you can really be the judge of that. You know what you experienced and what may best apply to your situation.
In any situation knowledge is power and you can never have too much.
Do what you decide is best and I encourage you to keep us updated on everything that is happening knowing we are here to help in any way possible.
I know the fear, confusion, and doubt that can accompany dealing with this and empowering yourself in ways to view and deal with this is an excellent start.