Question: Did Abraham and other Old Testament saints go to heaven, or since they lived before the sacrifice of Christ, will they be given a second chance during the Tribulation?
Answer: Romans 3:23-26 answers this question for us. Paul says that the redemption provided by faith in Christ’s sacrifice proved God’s justice in “forebearing” the sins of those who believed before Christ came. Though they offered animal sacrifices in obedience to God’s command and provision for forgiveness, animal sacrifices could not really take away sin (Hebrews 10:4). So God’s forgiveness of their sins was based on the anticipated sacrifice of Christ, the perfect sacrifice.
As to whether these saints are now in heaven, see Did Jesus Visit Hell.
Hebrews 9:27 makes it clear that once a person dies they face the judgment of God as to their eternal destiny. The Old Testament believers were saved, granted eternal life, and are now in the presence of God. They do not need to be given a second chance during the Tribulation. No one who dies gets a second chance. You must make your decision for Christ on this side of death.