I think the demon has latched onto you, and
is either trying to possess you and or kill you.
When you're a christian, as I am myself you're
a target for them. The only thing I can think
of is an exorcism. But in the mean time make
sure you stay grounded in your faith with GOD
continue in prayer. In addition just my opinion
I feel as though the demon is trying to ruin your
life and marriage, as you stated above and it will continue to attack you, and people close to you,
ie like relationship's or friendships. Also try to
get holy water and salt. The demon/evil spirit
is ancient, it feeds off of your fears, anger,
negative thoughts or feelings. Surround the
four corners of your house with salt (outside).
Clean your home do your laundry, make sure the
house is clean completely no mess, sprinkle
holy water around your home while reading
psalms or proverbs. Lastly do not at all interact
with the demon/evil spirit any longer! stay close
too GOD, cause it will try and break you but
endure through and stay faithful to GOD. I hope
this helps.