Fatigue as an early symptom?

I’m currently 9 dpo and got a negative test this morning. I know it’s still early and I’m not out yet. Just wondering if any of you experience extreme fatigue before or immediately after finding out you’re pregnant? I know fatigue can be a result of plenty of things, but the last day or two I feel like I could fall asleep at the drop of a hat. Just utterly exhausted and nothing in my routine has changed. Hoping maybe this is an early symptom for me. Let me know!