How do you handle a life change, such as in a career?

I have worked from the age of 18 to 24 as a PCA, Program Assistant, Health Coordinator, Medical Coding Analyst and ultimately began a career as a teacher at an adult day program for people with disabilites. During the last month I have lost my job, gone through personal changes in relationship status and friendships and an incident with a client resulting in my two front teeth needing to be removed and replaced with permanent ones. All of these things pushed me into finding a new job out of NEED not WANT. I needed a job-I was given one, but it’s in a field I have no clue about, but possesses great opportunity and growth in a single company which will lead to Management status’, relatively substantial income. But I have to persuade people an item is worth it-market it’s value-knowing what’s it’s truly worth and basically over exaggerate the epic-ness of a products true worth. Instead of nuturing those who need compassion, a leader, a stable confident and a caregiver who puts their rights and wants first… How do you change gears quickly without consequence—without losing your compassion, even though you know it will further the career you have the most passion for?