What happens when a Litecoin transaction won't confirm?

I sent a small amount of LTC to bittrex from a Trezor earlier and it has 0 confirmations.
I have never had a problem with sending or receiving LTC, in fact it is usually very fast.
I see that a few other people are having the same issue today.
If anyone can point me to the info I need to figure this out, please let me know.