baby rashes!

Hello! I'm a first time mom and currently my bb girl has baby rashes/acne. Nagtry ako mag google and sabi breastmilk daw -which I tried pero parang lumala pa, sabi din kusa daw siya mawawala. She's now 4weeks old, naawa ako kasi sobrang dami and namumula pa. Can you let me know if may naka experience nito? And what did you do? Any cream or soap to help ease the rashes?