Hey, my daughter is 6 weeks old, and i had her ...

Hey, my daughter is 6 weeks old, and i had her on S26 Gold when she was born, and she got constipated on that, so my clinic sister advised me the best thing to do was change her formula to NAN gold HA. Cause it was easier to digest. I tried this, and it worked great, she was pooing so well, but I noticed she always regurgitated alot of it, and she actually vomited alot too. I just thought I was feeding her too much, until she started to get a red rash all over her face, head, neck and back. She was also really unsettled, so i took her to the doc, and in the week i had her on NAN gold HA, she lost a whole pound. She was quite sick. I was told to try Karicare Gold. She has been on that for 2 days now, and her poos have returned to what they were like when she was on the S26. There isnt much more to try out there. Since taking her off the NAN 2 days ago, her rash has gone, and she hasnt regurgitated or vomited once. Please any advice, I hate my little girl bein so sad cause her poo is like a thick harder toothpaste.