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Ok, first. Breathe! You can tackle these things. Let's start one at a time. Can you look into a financing payment plan? A lot of rehabs can help you so that payments are made in manageable amounts. There are also free 24/8 hotlines who can talk to you. Whatever you do, do not spend at more money on crack!! That money can be better used towards food, home expenses, rehab, etc.
Get to a detox or rehab center. They know exactly the steps to take to cure you
That is a lot to handle! Pat yourself on the back for making it this far! That right there should be a self-esteem boost. Check out all you've managed to overcome. Addiction is not an easy fight and really not one that you should go at alone. There are free or low cost options available in every state. Start looking! Meetings are free. Go to meetings! Make friends with like minded people who are focused on recovery. My bet is that once you get clean your confidence is going to soar, weight will fall off, etc. Hold your head high. You're doing great!
Hope everything is going well with you.