Sorry you are mistaken. Muhammed was born in 570 in the Arabian city of Mecca, he was orphaned at an early age and brought up under the care of his uncle Abu Talib. He later worked mostly as a merchant, as well as a shepherd, and was first married by age 25. Discontented with life in Mecca, he retreated to a cave in the surrounding mountains for meditation and reflection. According to Islamic beliefs it was here, at age 40, in the month of Ramadan, where he received his first revelation from God. Three years after this event Muhammad started preaching these revelations publicly, proclaiming that "God is One", that complete "surrender" to Him (lit. islām) is the only way acceptable to God, and that he himself was a prophet and messenger of God, in the same vein as other Islamic prophets.
Muhammad gained few followers early on, and was met with hostility from some Meccan tribes; he and his followers were treated harshly. To escape persecution, Muhammad sent some of his followers to Abyssinia before he and his remaining followers in Mecca migrated to Medina (then known as Yathrib) in the year 622. This event, the Hijra, marks the beginning of the Islamic calendar, which is also known as the Hijri Calendar. In Medina, Muhammad united the conflicting tribes, and after eight years of fighting with the Meccan tribes, his followers, who by then had grown to 10,000, conquered Mecca.
The Quran is heresy because it contradicts itself, Muslim scholars must use the Bible to interpret certain passages because complete information is not found in its pages, it mentions people who have no historic proof of existence, while the people and places of the Bible have historic and archeological evidence. Further the Quran is heresy because it borrows information from both Judaism and Christianity and leaves out the most important reason God intervened in human history. Which is that all men have done wrong and deserve punishment. We have all not only sinned against God's commands but also have sinned against our own consciences - our own standard of what we believe is right and wrong. Unfortunately the punishment for all our sin is death (which is why we all die) but God in His love paid the penalty for our sin by sending His Son as a man (the incarnation and the reason we celebrate Christmas). This payment for sin is given to all who will believe and place their trust in Jesus. For God so loved the world that He sent His one and only Son that whosoever believes in Him would not perish but have eternal life. For God sent not His Son into the world to condemn the world but that the world through Him might have life. (and) God showed His love for us in this, while we were still sinners Christ died for us.
If you recognize that you have disobeyed your own conscience, if you recognize that you have suffered the consequences of your actions that have been unpleasant then maybe you can also recognize your need for forgiveness. Forgiveness is found in Jesus Christ's sacrifice - the fulfillment of all the Jewish sacrifices (made once for all). If you ask Him to forgive you and confess your faith in Him God will give you His Spirit which will teach you and lead you into the truth that sets you free from your sin.
