I can't do this

I haven't been diagnosed with PPD but I think I am depressed. I feel resentment towards everyone I know, I'm a FTM & a single mom. It's just my mom & I in the house and it makes me upset that she doesn't help, and kind of refuses to. I know this isn't her baby, but she talked about and asked me( my older sister doesn't want children & is gay, my brother is too incompetent to have a child & my younger sister is too young & immature to have a child so it left just me) to have a baby because she wanted a grandchild oh so badly. Now after I had the baby I realize it's because all of her friends are grandparents and tell her how much in love they are with their grandchildren, that she wanted a grandchild not because she was ready to love and have one. But not only does she not help at all, she's basically another headache. She constantly complains about how " if I wasn't ready for a baby I shouldn't have had one" because I leak and there's a milk stain on the floor, or the one time I accidentally left a diaper on the couch, or when I washed my babies clothes she complained. Or the awesome story of when I was in the bathroom with my baby in the car seat sleep to shower, as I'm on the toilet my baby starts crying and I ask my mom if she can get her she says "I'm busy" as she texts her boyfriend. Then comes into the bathroom 5 mins later once I'm nursing says " I don't have time for a newborn I told you that, I'm doing me..." Then realizes I'm on the toilet and ridicules me for being " disgusting " to nurse while on the toilet AFTER she told me no to helping me. I get NO help. My daughter doesn't allow me to put her down at all, so I spend my day trying to get things done in between her 5-20 min cat naps before she's screaming to be held. And I love my daughter to death I just wish I had a little help. Something as small as someone watching her while I showered and letting me sleep 3 hours straight would help sooo much. Everyone I know has small children of their own except my mother of course who doesn't even want to help me with my dog(financially). This is all beginning to be too much I feel like, and I'm starting to contemplate adoption for my 2 week old.