No credit card required
Browse credit cards from a variety of issuers to see if there's a better card for you.
BUI agree with the above posts and recommendations:
1) Please do not apply for more cards for now. please use your credit card sort of like a debit card. That way your score will be better without much debt to credit ratio. Most people with good credit scores never carry balances.
2) You need to first find out each credit card's statement closing date, not the due date because it's the balance upon closing date that each credit card company reports your balance to the credit scoring company. After that, you need to pay the the balance off about one week before closing date. This way your reported balance will zero. However please leave a less than 10%balance/credit on only one card. This way you will ensure to have the best credit score possible. Do not use your cards you just pay off and only start using your card after statement closing date. One way to make this easier is to call in and ask to change your statement closing dates to same or similar dates for all your cards. This may take effect the current month or It might take up to two months. Keep doing this every month and your score will improve if previous collection drops off while you don't apply for more cards. Manipulating your debt/credit this way will increase your score but it takes time, patience, and organizational skills.
3) No matter how good your are in managing your credit, I predict that lenders will be hesitant to give you more credit. You said your income is less than 12k each year and you already have about 6k in total credit. From here now it's only harder to get credit. Typically people get total credit about 1x of their yearly income. It's possible to get more but it will be tough. One thing to solve this is to increase your income.
4) this leads me to my last point. Do you work? You can get a job, better paying job, or more jobs! Most people on disability can still get paid better with jobs/disability combo than just disability. Please consult a social worker to help you. Secondly, please work with a psychiatrist and/or therapist as anxiety disorder can easily be treated and you may resume function and get a job, leading to more income and perhaps more credit later