Yes, you can certainly still be pregnant even if your period only lasted 3 days. A short menstrual bleeding episode can still occur while you are pregnant, often mistaken for a light period, or you could have ovulated normally and conceived during that cycle despite the briefer bleeding duration. If you suspect pregnancy following unprotected intercourse, the most reliable way to confirm is to take a home pregnancy test or consult a healthcare professional for a quantitative blood test to verify hormone levels.
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