I was in the hospital for about 4 days so I’m glad I actually packed a full bag. I brought bras, ( I used the massive diaper like underwear they give you) tank tops or whatever shirt your comfy with (nursing tanks if you plan on nursing), a robe, slippers, hair brush, toothbrush, face wash (or face wipes) I brought my normal shower products. Bring things to make you feel normal again. I’m glad I did since I ended up spending so much time in the hospital.
The hospital for you will provide pads, thin underwear, peri-bottle, bathing wipes, tucks wipes, shampoo if you stay long enough. For the baby they provided me diapers, shampoo, comb, mucous syringe, baby wipes, thermometer. I left within 24 hours of her being born so I didn't get to shower. I'd pack chapstick, comfortable socks, your own underwear and a blanket those were the things I was so happy I took.