I had to bring a blanket with me, I sleep with a comfy fuzzy blanket every night so definitely needed one because the hospital sheets were so thin but the hospital pillows were just fine, if you need more you can ask for more
Just make sure they look very different from the hospital ones. I mean, it’s a small possibility, but you don’t want some hospital worker thinking they’re hospital linens and taking them away while cleaning. (Small possibility because you probably won’t be gone from the room for long, if at all, but just in case.)