My daughter is so sensitive i only use Luvs & Pampers on her
We have used 3 diff brands for our daughter and never had a prob with any but I recommend Walmart brand (parents choice) they are great and they hold a lot!
They also don't have the perfume smell to them that I noticed pampers has.
I used pampers from birth and havent had any problems :) just try wa you thinks best. No one can tell you what to put ur baby in but you. I hope the rash goes away.... Try using a drop of bepanthen on every nappy change x