Should you take a 4 month old to the doctors for a cold?

Sav

My baby girl has a cold and I can tell it’s bothering her. She’s super congested at times so I’ll use the aspirator and saline drops but it’s still not enough. Other times her nose runs like a facet. She has no fever. I just don’t know what to do. I remember reading something like when they are young a cold is serious so idk if I should take her to urgent care or what. Any tips and tricks?