When you use Capital One Creditwise, on the bottom, there is a link for score improvement. They can give you suggestions to raise your score.
If you have not missed any payments, then there is nothing to worry about the 72 point drop. The credit card reports to the credit bureaus your balance at the time that they print the statement. If you owe $1000, and you pay it the next day, they will still report $1000 is owed. The next month, if at the close of the billing cycle your card is paid down, they will report a 0 balance, even if the next day you go and max out the card again. Dan always suggests to keep a $2 balance on the card when the cycle closes, so they report some usage. As long as next month your usage is a low ratio compared to the available balance, your score will shoot right back up. I've seen it go up 100 points by paying down a card in full. It doesn't matter as much the numbers of how much is on the card, it makes a bigger difference of the percentage owed compared to what's available.
And you should know your score before applying for your next card. If it's not good, then don't apply. Too many credit pulls is bad for your credit score.