Is it wrong to take a 6 week old baby to public areas?

Araceli
I've been told to not take my baby to public crowded areas until she's 3 months. That is my plan but hubby gets so annoyed with how in his words "over protective" I am of my baby. He has been pushing me to go out in public areas with baby. I'm always worrying about whether baby might catch something or get sick. 
Just recently I noticed that every time we go out, my baby gets red bumps all over her skin. Is this due to taking her out??? Is it the car seat or basinet that she might be alergic to???