Extreme fatigue as early pregnancy symptom?

Hey all! I’m 12dpo and I’m waiting to test a few more days since I’m always disappointed. My last test at 9DPO was negative. For the last two days I have been absolutely exhausted! Yawning constantly....needing bed almost the second I get home from work and not easily roused whatsoever. I know this could be a number of things, but is this possible as a very early pregnant symptom?

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