Newborn sneezing and boogers!?

Courtney
Okay second time mom here but I don't recall my first sneezing so much though I understand that it's normal because that's how they get dust out... well she sounded like she couldn't breathe (periodically) through her nose and she sneezed out yellow boogers and snot... my 20mo has caught a viral infection on Tuesday of this week but it's not cold.... am I freaking myself out that my newborn is sick or should I definitely freak out and take her to the drs? I don't want to expose her to anymore people because that's where my toddler got sick on Monday and it was so crowded and so many sick kids... I'm really scared that she is going to get sick and I'm think all the worst outcomes of that and I'm just freaking out. Also with the stress of my 20mo girl who is sick I hate seeing her sick...and no sleep and I guess my husband just had to blow his nose cuz it was running... so now he is prolly sick :/ any mom's experienced with this or know please comment. My newborn is 8 days old.