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Welcome to the FICO forums!
The best place for you to start your credit scoring education would be here:
First thing to do would be pull all 3 of your CR if you have not done so already. You can get them free here:
https://www.annualcreditreport.com/cra/order.
Once you get them, go over them with a fine tooth comb.
Ask any questions you may have.
Do not post personal information.