In need of some advice lady’s!

Dessa • Mommy to a handsome boy 💙👶🏽

So my little nugget has been having a really hard time pooping I’ve called the dr and all they said was it’s his body changing. His a 7 weeks old I’ve tried apple juice, prune juice ( which has worked once), belly rub with his legs up, and stimulation(which has worked once, but I don’t wanna have to keep doing this). Any other ideas on what will get him going fast his not been able to sleep good.