To start with, go to confession. Even before that, the Jesus prayer:
Jesus Christ, son of the living God, have mercy on me, a sinner.
When you return to Him you WILL feel Joy and Peace.
I will be praying for you.
Yes, please follow Ignatius’s advice.
Eternal God, in whom mercy is endless, and the treasury of compassion
inexhaustible, look kindly upon us and increase Your mercy in us, that in
difficult moments we might not despair nor become despondent, but
with great confidence, submit ourselves to Your Holy Will, which is love
and mercy itself.
Amen
St. Michael the archangel, defend us in battle. Be our defense against
the wickedness and snares of the devil. May God rebuke him we
humbly pray, and do thou O Prince of the heavenly hosts, by the
Power of God, cast into hell satan and all the evil spirits who prowl
throughout the world, seeking the ruin of souls.
Amen