Hi Lydbun, 

I am in a similar situation as you, I am 26 and I'm in university as well. I don't live at home, but I still live in the same city as my parents. At this moment, I would say to stay in school. What is it that your mom has been diagnosed with? Do you know the stage? My dad was diagnosed with advanced prostate cancer in the summertime, and I wanted to quit school, move home and just spend all my time with my dad, but my dad wants me to pursue what makes me happy, and I'm sure your mom would want the same for you as well. 

I think you are right at the moment, it's still early. I would say to try not to make any rash decisions as of yet. Let the news take a little time to sink in, I'm sure you're still in a state of shock and disbelief. Those feelings will always remain, but it does get a little bit easier to deal with once you've had time to let it sink in. And NO that does not make you selfish! If you don't know the full results I would just wait and see. Waiting is the hardest part because I'm sure your wild is going wild, but making a decision now when you don't have all the information wouldn't be the best idea, right? If you ever need to chat, I'm always here! And the people on this site have helped me a lot over the past 7 months!