The Scriptures state at Proverbs 18:10:
"The name of Jehovah is a strong tower. Into it the righteous runs and is given protection."
The apostle Paul said:"With every form of prayer and supplication . . . carry on prayer on every occasion in spirit.” Therefore, pray aloud to Jehovah God, through Jesus, asking Him to take this wicked spirit out of your house and and out of your life.Hence, you should keep on praying to God to “deliver you from the wicked one,” Satan the Devil. (Matthew 6:13) Jehovah will answer such earnest prayers.—Psalm 145:19.
It´s not going to be an easy fight but with time its gonna leave you alone. In order for you to be less anxious, I´ll leave you these comforting words:
Philippians 4:7:
"Do not be anxious over anything, but in everything by prayer and supplication along with thanksgiving let YOUR petitions be made known to God; and the peace of God that excels all thought will guard YOUR hearts and YOUR mental powers by means of Christ Jesus."
And James 2:19:
You believe there is one God, do you? You are doing quite well. And yet the demons believe and shudder.