Only worry about what you can change right now in this moment. Everything else is irrelevant. Take on your challenges one at a time and communicate as much as possible with everyone around you. Most people you encounter want to help you if you just have the courage to ask for help.
I was hit by 2 cars riding to work on a bicycle 2/26/14. In a nutshell, I had a broken neck and back. This is the best advice I can give.
Your car is probably low on oil, just needs new spark plugs, or the battery needs replacing. You need a good shade tree mechanic that is honest or a friend that is into cars or was. If you know anyone that worked on their own project car and did motor stuff on their own, that is the person to talk to first. I was that kind of person. I can tell what is wrong with a car just by hearing it, or at most, driving a short distance. There are lots of people like me that want to help you too.