Kitten at my house died.

About a month ago, a stray kitten showed up. I already have a cat and my mom didn’t want another one in the house so I just kept the little kitten in the outside patio and fed her and took care of her. She was always so energetic until a week ago. It’s like she became sick so I brought her in my room because it was getting cold outside. She started to feel better and the next day it was warmer, so I put her in the patio again but made sure she was covered in blankets and in a nice box. This morning, I went outside to feed her and found her dead in the box and none of her food from yesterday was eaten. I am so hysterical right now. I don’t know what happened. I feel like it’s my fault. I should’ve kept her in my room regardless of what my mom said. I really don’t know what to do. 💔