I highly recommend using a credit building website to monitor your credit such as CREDIT KARMA or CREDIT SESAME so you can monitor your credit.
Doing this allows you to see how tour credit actions have consequences, both good and bad. Almost in real time, usually weekly or monthly as it updates.
This is important, and they are free. You can monitor credit inquiries, reporting, balances, accounts, payments, spending and lots of things.
I had a delinquent account on my credit for 7 years, it finally was removed but a year later it came back. Because I monitor my credit, I saw it came back and was able to have it removed. They cannot add an account back once it falls off unless its a new account or delinquency. Had I not monitored my credit, I would not have known this was added back.
Also. The 7 year rule is 7 years from the first reported date of delinquency not the date it was opened.
Also, the more AVAILABLE CREDIT you have, the more you can spend and not dramatically hurt your credit. Example, if you have $50,000 in availabil credit, you can spend $5,000 and not kill your credit. I have found that anything over 10% of available credit will take a big hit on your score. They say 30% but I have seen huge changes at 10% or more. So if your available credit is only $10,000, which sounds like a lot, if you spend over $1,000 your score will take a big hit. It is temporary and will improve as the balance decreases, but keep that in mind. Especially if you need to open a new account you want a high score so paying that down may be a good idea.
Credit scores vary based on which bureau the lender uses and what type of account you want. There are different scores for auto, home, cards, etc. So it is not one score fits all. You can get your specific score from the 3 different agencies but they are not free, but they do offer them online.
I have learned a lot from repairing my own credit over the last 5 years, feel free to ask me questions and if I can I will happily help.