Church's are always a good place to look into church groups in ur area that help with clothing donations
What state are you in maybe some of us can tell you where to look for assistance. We have pregnancy help centers here in Louisiana that help alot they work with you and you can work for stuff that helps with baby like crib, etc
I went to pregnancy classes and they helped me with stuff. Focus on pampers and wipes they will grow out of clothes. My ma always said buy a couple of outfit cause in a blink of an eye they will grow out of it.
Where do you live and what are you having?
I'm so sorry. I was given nearly everything for my baby and I haven't had my shower yet. Check out yard sales, my mom found some amazing deals for me. Do you know what you're having? Sometimes just sharing that with friends really helps. They might have baby clothes stashed away that they might give you. I'll pray for you.
Also Craig's list. Sometimes you can get things free from there too. Maybe talk to places like YMCA. See if you can get government assistance. Etc.
Have you checked out second hand stores? And yes a baby shower could help.
If you have friend or co workers ask if they could due a potluck for a baby showered if you work...