What can I do to emotionally handle a leukemia diagnosis?

Support Net. Build/maintain your support net. That is inclusive of friends family as well as cancer staff such as your md, nurse, counselors, etc. Patient navigators can also help you navigate a new diagnosis and treatment. Many centers have cancer counselors as well.
Think positive. What happens happend we can't change it, and this the will of god. But nowadays there are plenty of medication that u can use and hopefully god will be helpful.