Too early for early pregnancy symptoms?

If I were expecting, I’d be 3w3d based on LMP. I’m not trying to conceive, but my partner noticed I’ve been way more tired lately, I’ve had nausea mostly at night, and I’ve had a dull headache constant for the last 5 days. Which is very rare for me. Obviously I can’t test yet, and I know I’m not symptom spotting because it was my fiancé who put two and two together. But any one else experience these things THIS early?