Ay normal lang yan mama, don't worry! During first trimester kasi ang body mo ay nag-aadapt pa lang, plus ang hunger cravings ay talagang malakas, especially when you find out you're pregnant, parang bumubukas lang ang appetite mo bigla haha. A few of my mum friends gained around 3-5 kgs in the first trimester din, so you're not alone sa situation mo! Best talaga na tanungin mo ang OB mo kung okay lang ba ang weight gain mo based sa your height and starting weight, kasi every mama is different, pero honestly 3 kgs in that short span ay hindi pa considered alarming. Just try to eat healthy choices when you can, mas importante yan kaysa mag-worry about the numbers pa lang ngayon.