Boy moms! should I be pulling back the foreskin?

My 4 month old was circumcised after birth & it seemed like everything was healing well, we put Vaseline & were gentle around it. But around 1 month old I was giving him a bath & noticed it looked a little weird (the foreskin had just kind of close up around his penis) I showed my husband because I'm pretty clueless penis-wise other than with his & he agreed it looked a bit odd. We showed our pediatrician & he said it was pretty common & that every time we change or bathe him we should just pull the foreskin back & occasionally put some Vaseline on once it's pulled back. He said that until he hits puberty he'll just have some extra. So we've been doing this ever since but I always see comments on here saying how bad it is to pull back the foreskin or to never do that!! So should I stop?? Or is this normal?