Just fed baby homemade banana bread and noticed- after she'd eaten it - a black colouring on the bottom of it. Presumed it was from the banana until I took another taste and it tasted metallic. Checked the pan and noticed that the non stick had worn away on one area and rust had got through the grease proof paper. Not the whole cake had rust on it but might be that my baby ate some 😬 Is this super dangerous? Do I need to rush her to doctors?