T.S.
Both of my sons were allergic to milk. My oldest had a rash over most of his chest and abdomen. They were very tiny bumps, almost like a heat rash. He also had some slight wheezing but it wasn't until he was 3 weeks old that he was diagnosed and he was able to tolerate soy milk just fine.
With my second son, he was on breast milk first, then I tried breast milk after eliminating dairy from my diet (which didn't help), then we tried soy milk for a while (which didn't help either), then we ended up having to go with Nutramigen because he had a milk protein allergy. He also had severe colic throughout this whole process. A couple of ways our pediatrician was able to tell was that he had a distended stomach and the easiest indication was his stool. If it has mucus or blood in it, this could indicate an allergic reaction to milk protein. Your pediatrician should be able to test her stool in the office if you have concerns.
I'm not sure about the patches on her face but it doesn't sound like it would be from formula unless it is from formula leaking onto her face or something. I agree with the previous entry about the fenugreek, it really does work. (I only took one capsule a day though)
Just an FYI about Good Start. My second son had the worst colic ever when we tried it. It could be because it had more of the milk protein (which he was allergic to) but I don't think I will use it again.
p.s. So far, my 7 week old has not had any reactions to breast milk.