Besides SO, who do you lean on for support and/or advice? My go too is my mom and sisters, they all 3 have had daughters so I feel like whenever I'm stressed/confused/worried I call my mom and then my sisters to get their opinion. I also use my daycare lady, she raised 3 daughters and I feel like she's seen it all with her 20 years of experience in childcare.
My daughter is one of the oldest kids in our group of friends, so they usually come to me for advice, but I can't really go to them for questions since they aren't at the stages of development, ect. that we are. they do allow me to vent though, and then about a 1-2 years later they some and say "oh you weren't kidding with xyz!"