So, I called the pediatrician. Verdict: as long as he is not uncomfortable, don’t worry. As everyone has been telling me ( yes Brown-eyed girl) breastfed babies can go a week without pooping. But if he gets uncomfortable (or I just can’t wait any longer) try the manual stimulation with the thermometer, put his knees up to his chest, or try glycerin suppositories( yes Nina, you were right!!!).
He’s just really gassy now. But doesn’t seem too uncomfortable other than that.