Aw, alam ko na worry mo, mama! Please take your baby to the doctor or sa nearest clinic agad para malaman kung ano exactly ang cause, rashes can be from different things, at kailangan ng proper check-up para sure. A few of us moms learned the hard way na better safe than sorry with baby skin, kaya don't hesitate to go in! Your instinct as a first-time mama is always right, so trust it. Sending you strength, sis, the doctor will help you figure this out quickly.