Ay, totoo yan! A lot of us preggy moms experience chills in the afternoon, lalo na early pregnancy, iba-iba ang body temperature natin dahil sa hormones kaya minsan nakakainit, minsan nakakalamig. Pero since you're only 9 weeks, mas safe na i-check mo na lang with your OB para ma-rule out kung hindi lang yun hormonal changes or if may slight fever involved, para may peace of mind ka talaga. Wear layers lang para comfortable ka, and hydrate well!