Confessing the Lord Jesus Christ is implicit to your martyrdom. Your confession has brought you your plight. If the Holy Spirit has led you to witness a good confession by the relinquishing of your life, then to refuse to lay down your life is to deny the LORD Jesus Christ. You have been promised by no greater authority than the LORD Jesus Christ that you will be denied before God, ie. Martyrdom Is the Price of Your Opportunity to Testify for Christ 1.
Tribulation saints have more certainty of martyrdom than of deliverance.
Escape is no longer an issue for you. Testimony for the LORD Jesus, that He alone is the only true God, is the course laid for you. Trust your LORD to give you the words to speak at the time of your martyrdom. Only be fully persuaded that your life and death will testify of your LORD Jesus. Regardless of how many, or who actually, witnesses your martyrdom, your LORD Jesus sees, and is pleased.