My Goodness, you have certainly been through a lot! Your body is going to take time to heal from the surgeries and adjust to the new state of having no kidney and no "female parts" from the hysterectomy. Your fatigue is probably just normal from everything you've been through, but I suggest you make sure you're not needing a hormone adjustment following the hysterectomy. Also, if you're taking pain medication that will make you want to sleep a lot. Or...if you're anemic sometimes you're really tired and sleepy. It could be any number of things. But most likely it's just going to take time to get over all this.
I'm so glad your cancer was only stage I. With RCC so many people don't even know they have it until it's stage IV. I hope you're feeling better real soon!
Nancy