Unsettled baby

Jessica

My baby is a month old today, the last few days she has been extremely unsettled, I feel like she may be intolerant to something thats in my breast milk, her poo’s are very explosive and bubbly sorta like acidity and she has a rash all over her face, neck and head, there’s nothing new I have recently eaten so not sure what’s going on has this happened to anyone else?