How much was the transaction fee? I doubt that your transaction will never get confirmed in time.
And if it does get confirmed, your only shot will be to contact Bittrex support and pray for them to help you. Some exchanges will ask for a fee to help you since it's "too much work for them". But I don't know if that's the case for Bittrex, and it may not be worth if you lost a low amount of money.
Thank you for reply, sadly confirmed what I had thought. Admittedly it's a small amount to most people, but a fair chunk to me.
According to Blockchain, the fees are 0.00116184 BTC.
Fee per byte is 311.485 sat/B.