5 week old break out !!

He’s only 5 weeks old and a couple days ago he started breaking out but not this bad. I put baby powder on them and they started to clear up. We went to his check up last week and i mentioned the breakouts to the doctor and when she looked at them she said that it may be some form of eczema and to just moisturize him with Vaseline. That was last week and now his skin looks like this. I just bathed him for the night to realize it has gotten a lot worse and it’s making me nervous . Should I be concerned or is this normal? Please tell me I’m not the only one who’s been through this i need a little help. Btw i am breastfeeding as well so idk if that will have a factor into it or not.