Hi! Honestly, 2 days lang ng period is usually not enough to say you're definitely pregnant, pero it's also possible na shortened cycle lang or irregular menstruation, lalo na if stressed ka or may changes sa routine mo. The safest way is to take a pregnancy test after a few days (mas accurate pag mas delayed na talaga) or check in with your OB para sure, kasi they can do a blood test which is more reliable pa. Don't stress too much muna, many things can make periods shorter or different, pero better to confirm lang para peace of mind mo.