Rash or baby acne... Help!

Amanda
Everyone keeps saying it's baby acne, so this might be the whole "new mom freaking out" thing... My daughter has these little red bumps on her cheeks, and they matched every googled photo of baby acne. They get a lot darker when she eats, but it could be because her cheeks get damp (she dribbles formula on her face and bib, and she rubs her face on the bib sometimes). She is 6 weeks old, and has had this about a week. She has been drinking the same formula since she was 2 days old. Could she have developed an allergy? Is it just baby acne? Her are 2 photos. One after she ate and one an hour after eating.