Hello everyone! We've been on mixed feeding since the first week of li…

Hello everyone! We've been on mixed feeding since the first week of life because there wasn't enough breast milk (there were no surges, I don't know why, it's frustrating no matter how hard I tried, but I could only get a maximum of 70 ml from both breasts), and my baby is almost 4 months old. We had terrible colic initially; sometimes he could only poop with the help of a gas relief tube, and we were using Humana Platine. One day, the baby pooped on his own, but a plug came out (a very thick piece of stool), and then the doctor switched us to Alfare Gastro (a kind of therapeutic formula) with a complete protein hydrolysate and lactose-free. We've been on it for 2 months; now the baby cries when eating it because he doesn't like the taste, it's bitter. On this formula, he either poops once every three days or once every five days, but his stomach is calm, although sometimes he farts with crying. And somehow, I don't want to be on such a formula permanently; after all, the baby should somehow produce his own lactase enzyme, plus the formula is kind of light and I'm worried that when we start introducing solid foods tomorrow, he might react to everything because of this. So, we want to switch to Nanny with prebiotics; I read that it supposedly helps with constipation. I don't know what to do. The doctor says that it doesn't matter, we'll have colic on Nanny anyway ??‍♀️. But damn, colic is physiological up to 3 months, maybe everything that happened was because Humana didn't suit him and just general physiological immaturity of the GI tract. Can anyone share their experiences, please? Who else is on mixed feeding or fully on formula?