Getting into heaven or is not determined by whether your good deeds outbalance your bad ones. The wonderful thing about God's mercy is that no matter how sinful you are, turning to him in genuine repentance will get you back in God's grace. Otherwise, heaven would be quite empty of souls. When you end up in heaven or in hell, you may be surprised by the presence of souls you had not expected to see and the absence of souls you had expected to see there. As Jesus has said, the last will be first, and the first will be last. Regardless, we must pray hard for the salvation of all the souls, for nothing is impossible with God.