Is this normal poop for a 5 week old? TMI

✨J

My LO is on formula milk, I decided to try anti-reflux milk made by the same brand, after been advised from the HV. After his 4th bottle I decided not to continue with it as he was extremely uncomfortable for 4+ hours. I went back to his old formula and after his 3rd bottle this happened... he is pretty settled now but is this because I changed his formula so quick?