Has anybody or is anybody using aptimal hungry baby formula and their little one is constipated?

my little girl was wanting to feed every hour to hour and half so I switched to this and it was ok at first but her poop is now formed it's never come out in pebbles but can be difficult for her to pass sometimes (like today) so I don't know if that classes as constipation. she tried doing a poo today but it seemed to much for her to push so she didn't do it but she's sleeping so doesn't seem in pain but I'm at a loss 😞

I'm following this one as my baby don't stop eating every 2 hours and health visitor has told me not to due to constipation😩😩