My son started milk about 2 weeks ago (full milk a little over a week ago). He is becoming reall constipated. I feel sooo bad. I gave him prunes the other day, and that helped for 2 days, but now its back. He was on nutramigen before this...I dont know if this is why

Also, he has broken out above his peepee area a little bit...do you think this means anything?

Thanks!