Does not conceiving after years mean that Allah is angry with the questioner and has not forgiven her statement, "I do not want Allah to provide for me now. Let Him provide for those who are deprived, not me," and does Allah forgive a sin like this?

Allah is Forgiving and Merciful; He forgives sins through repentance, and one who repents from sin is like one who has no sin. Have a good opinion of Allah and trust in His pardon. As long as you have repented, you are upon goodness. Take the means for conception and supplicate, and increase in acts of obedience, for "indeed good deeds efface evil deeds." Entrust your affair to Allah and be content with His decree.