[buff-a]

I don’t even know what I am working for at the moment since everything seems so unpredictable. Every feature that I design and code may just get changed or scraped upon completion. Even if I do complete it, when am I going to get paid for it? Or will I even get paid?

You are not burnt out. You are just living in fear. I totally understand. You are going to have to confront a different fear to change this situation: your fear of sticking up for yourself in contract negotiation. Bottom line: if someone owes you money, its your fault. If you don't know if you will get paid, its your fault.