Depression Support Group
Depression is a real and debilitating condition that is often misunderstood by family and friends. Its meaning can range from a prolonged period of sadness to an actual mental illness with specific symptoms. Find and share experiences with others who are going through the same struggles.

What's wrong with your car? How can I help?
Please do not try to tackle the whole thing, just work to take steps to incrementally improve things. Have I done things a little better, helped solve a problem. Good luck and there are people here willing to use whatever knowledge they have to help.
On the tire, if the leak is in the tread (and not the sidewall) then its a pretty cheap fix to put a plug in the tire. Stop at a tire store and ask what it would cost. I'll bet less than $10. If its a bead leak they will have to remount the tire and if its an old tire, then they may not be willing to for safety reasons. If the hole is in the sidewall, the tire has to be replaced for safety reasons.
I'm sorry about your pet. How about calling some local animal shelters and ask about low cost vet care? Tell them about the UTI and that you are low income. They may be able to connect you with a vet for cheap.
It's hard, I have a family member who has been fired from several jobs which he attributes to bad luck, but he did not really work hard or do what he could to achieve the company's goals.