Have I committed disbelief by what was mentioned of the events, and what must I do, and who is the child to me, and what can I do so that Allah may forgive me and answer my prayers?

Satan lured you into going to the church and committing grave sins such as adultery, attempted abortion, and drinking alcohol. You must immediately repent of these dangerous actions before it is too late, for the door of repentance is open to whoever repents and turns to God. And whoever repents, believes, and does righteous deeds—Allah will change their evil deeds into good deeds. As for procrastination, it is dangerous because death comes suddenly, and repentance is not accepted at the time of death. As for the child born of adultery, she is attributed to her mother and not to you, and you have no rights or obligations towards her.