Congrats! Stick with it and you'll hit 700 in no time. I was stuck hoevering around high-600's for mooooonths (felt like a lifetime) but as soon as I paid down some of my balances it started finally breaking into the 700's. I did Discover Pre-qual today and was happy to see that the denial letter said my score was 701 
Total Loan Balance: $43k / $65k
Total SL: $78k