acouple days ago i found out my grandpa has heart problems and bladder cancer, and i am super sad. my mom hasnt been too happy either (of course...) but do you guys have any advice??? please

What a sweet grandchild. I would suggest making short visits because he probably tires easy with his condition and the medicines he is most likely taking. The medical world is much more advanced today than it used to be. My father had bladder cancer and he has recovered well. You might want to ask your grandfather if there is anything you could do for him or get him, such as magazines, books from the library, or even a hug.