Okay ladies first- congrats on your upcoming babies! Also great nesting instincts - urge to purge love it!
To start- Make a call to a charity that will come to your house for a pick up. Find out what they won't take first in case you have to call another. Also tell you neighbors, maybe they need to do this as well and the truck is here and they can load their stuff as well. Also the comradie is fun. Once you have apickup scheduled, a deadline is in place and that helps you.
Next- baby steps. Someone mentioned a junk box in every room. Start smaller. Start with one thing first and once you get an idea what works for you, the rest will be easy. I suggest start with outgrown clothes for kids.
Have 3 large containers or boxes labeled KEEP DONATE TOSS
Have an open area and put all of the outgrown stuff there. Start going thru the large pile and set a timer for 30 minutes. Start doing a quick sort into the containers.
If you second guess an item put it in the keep container for now.
Anything stained, worn out, or ripped, missing a button etc toss. The charity dosent want it either.
After the timer goes off- see you results. You might have a larger keep pile.
In the TOSS box, put those in a garbage bag and put it somewhere else- garage, outside etc to add to later.
For the DONATE box, also start a garbage bag labeled DONATE. Put all the donate in there. Put that in the other room for now.
Now take the keep pile and dump it on the ground. Do another sort. Ask yourself- Do I love this? Do I like this? will I use this again? Does it bless my home? If any answers are no, donate it.
This whole process should take about 1 -2 hours. When you are finished put the keep pile in its proper place- dresser, storage for the next child where ever it goes. If there is no place for it, you should not keep it. This is the only way you will dig out of this mess that you are speaking of. It works and its easy. Once you do this, you will get really good at it and it should take less time.
Once you have a donate pile- do you have a friend with boys younger? Offer the clothes to them and then donate it if no one wants them.
For the toss bag- get it out with the next garbage cycle so you don't change your mind.
This also works with linen closets, kitchen cabinets, storage areas, and garages. But limit it to 2 hour stretches over a few days time and you will find space in your house you did not know you had.