That's awesome - good luck for the 10K! The runworks calculator predicts a time of just under 1:08 based on that 5K, and if you have been improving since then you might even do better.

I have not yet run a 10K to my satisfaction. I keep having pacing issues - in other words, I go out too fast and I limp miserably to the finish line. Well, I did that twice, in the two 10Ks I have run. I hope you manage yours better than that.