Mama, I know how scary that feels, but please call your pedia TODAY or go to the nearest clinic, don't wait for tomorrow's appointment. Constipation in a 9-day-old needs to be checked ASAP, especially since baby was pooping frequently before.
In the meantime, a few of us moms have noticed that sometimes gentle tummy massage (clockwise) or keeping baby warm helps, pero talaga, the doctor needs to rule out anything serious first. Don't stress yourself, this is something your pedia can assess right away. You're doing great checking on this!