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Your credit score is based on a couple of factors.
One of those factors is credit history so the amount of time that you have had credit cards and/or student loans and how well you are paying on time.
However, another factor that goes into account is your debt to equity ratio
When your debt is higher, this ratio is worse and goes against you because your credit-worthiness goes down as the higher your debt is, the higher risk you are for other creditors.
Thus, the first thing you can do in the short-term is to pay off as much debt as possible in the short-term.
I would start with paying off the whole credit card debt.
Then, as much of your student loans as possible (even more than the regular payment).
This may help in the short term.
Another quick way to fix this, is to become an authorized user of someone who has great credit.
Then the credit history of that specific credit card will reflect positively on your credit score.