Just feeling sad

My mom and I rescued this cute little honey pie that had gangrene on its hind leg. At first we thought that she was okay apart from the leg that had to be amputated. On the day of the operation the vet called to tell us that her breathing sounded strange and that they wanted to check her on an xray. It turned out that it was a diaphragmatic hernia and that her bowels had moved up to her lungs. So the plan was to fix the hernia and when/if she’s stable amputate the leg. The operation went okay, she made it out alive and she had an oxygen mask put on her because her lungs had shrunk due to the hernia. The last thing we heard that they had removed the mask and that she was breathing on her own albeit with difficulties. I was supposed to take her home with me until i found her a forever home, and i was really excited to see her and pet her, even thought about the possibility of keeping her. However sadly today they called us to tell us that she had passed away. I only spent a little time with her, she was so so sweet and now I’m crying my eyes out. Just wanted to write this here for her.