God will help you through this attack from the Enemy, who loves getting believers to doubt and worry needlessly.
you love Jesus, you know who He is, you belong to Him and follow Him. why worry? ask the Lord to secure your heart, grant you faith, and strengthen you in the Holy Spirit. then let go, and let Him work on you. trust Him. He loves you, and nothing in the world or under or over it can snatch you from the Father’s hand.
here are some Bible verses to help you :
"My sheep listen to My voice; I know them, and they follow Me. I give them eternal life, and they shall never perish; no one can snatch them out of My hand. My Father, who has given them to Me, is greater than all; no one can snatch them out of My Father’s hand. I and the Father are One." (John 10:27-30)
For in Him you have been enriched in every way—in all your speaking and in all your knowledge— because our testimony about Christ was confirmed in you. Therefore you do not lack any spiritual gift as you eagerly wait for our Lord Jesus Christ to be revealed. He will keep you strong to the end, so that you will be blameless on the day of our Lord Jesus Christ. God, who has called you into fellowship with His Son Jesus Christ our Lord, is faithful. (1 Corinthians 1:5-9)
For which cause I also suffer these things: but I am not ashamed. For I know whom I have believed, and I am certain that He is able to keep that which I have committed unto Him, against that day. (2 Timothy 1:12)
God bless you! Jesus is faithful, merciful, gentle, and almighty. He can and will keep your heart and faith safe and in Him until that day, when He calls you home. don’t worry! just tell it to Him, and trust Him, and take good care of yourself, too.