rash help!

what is this rash? pics dont show it as well as id like. its hard to see inside, but natural light shows it so much and it looks awful. :( my poor baby is almost 7 weeks. i thought it was baby acne, but now it looks red and is popping up in creases, like eczema. she has a dr appt next week, ive been putting on a natural healing balm daily and it seems to help, her face was broken out all across her cheeks and chin.

edit: she's rarely ever outside and is in the house with a/c 99% of the time. is it possible for her to get heat rash from sleeping with me/body heat?