Single mothers, help!

Has anyone felt so low and depressed to the point where they feel like they aren’t being a good mother? Then you feel like you want to do legal guardianship for your child so they can have a good life until you can get it together ? I’m 20 years old with a 9 month old. I’m just Crying and stressed out mentally I’m not here, my family is bashing me for my decision I want to make which makes this situation worse. My child’s Dad left us not too long ago with nothing, no money at all I was manipulated .. I’m a stay at home mom so really we depended on him. Just looking for advice please