Am I Just an Accidental Human With No Legacy

I was maybe 7 or 8 years old when I realized that the time between when my parents got married and when I was born was less than nine months. Growing up, that realization never bothered me and I never felt like an accident. But, the notion that I was an accidental human took on a different flavor as I got older and started to feel the pang of existential questions like “what is my purpose?” I felt that I had to justify my accidental existence by leaving a big legacy.