I lost 11 songs off my iPod Touch 4G!

I have an iPod Touch 4G. I re calibrate it onto my laptop, because it is meant to make the 'other' storage folder smaller (which it didn't.) I had just bought 11 songs on the iPod from the iTunes Store before I re calibrated. As I did so, it wiped my iPod without backing up and/syncing my songs onto my laptop first and now I have lost 11 SONGS!! 😟 What can I do? I really need those songs back! I even have proof of the purchase because I have some of the receipts of these songs in my Email Inbox! Somebody please help! 11 songs is a lot and it also isn't cheap! So please help and answer if you can!

Thank You

Alyssa 🙂