<prompt> Human: Hey Guys, so I am looking to fix my credit score and unfortunately I fell behind on some of my payments that were sent to collections due to medical issues.I am now working regularly and am looking to get back on my feet but how can I fix my credit score?Im not sure if I understand correctly but it seems that all the advice around here is on how to fix credit scores when its not your fault.But what about when it is? How do you fix it? Can you still send certified letters to creditors and ask them to remove derogatory information?  <response>: pay your debts, and keep paying your debts. 