Girls, we're three months away. The baby is capricious, crying from…

Girls, we're three months away. The baby is capricious, crying from midnight until three, straight like on the clock. Is it teething? The older one started to erupt around 3.5 months, somewhere around 3 months there were colic, then after two weeks the teeth started. The younger one seems to have erupted earlier, maybe?olives stopped around 1.5 months, noticeably calmer since then, but has been crying for the last week.