Girls, hello! I'm talking about weaning. Who can advise and has experi…

Girls, hello! I'm talking about weaning. Who can advise and has experience with such? I started feeding at exactly 5 o'clock, after puree, I had stomach pain, so I stopped feeding and gave him a small amount of Entrogermin. It's been two weeks since then, I started giving food again, but my stomach hurts again. I tried different purees and my stomach hurts on all of them. A friend advised to try a non-dairy porridge. I think I should give it a try and if my stomach hurts again, I will go to the doctor.