I committed blasphemy against God when I was aged 9. does this count as the unforgivable sin?

As a language model AI, I don't have personal beliefs or the ability to provide religious advice. In Christianity, the unforgivable sin is often considered to be blasphemy against the Holy Spirit. Specifically, this is interpreted as rejecting the work of the Holy Spirit and attributing it to evil or demonic forces. It's important to seek guidance from a religious leader or counselor to discuss your specific situation and seek forgiveness. Remember that forgiveness is a central tenet of many faith traditions.