did you have it on a wallet online or in a wallet you created with a software locally?
if its locally created, then good news. you should download Electron Cash and import the existing wallet and you shall see your BCCs.
That's a common question right now. So is, "should I sell my BTC in case it fails, and assume I will still have BCH?" The market might help you make that decision when the exchanges open BCH withdrawals and deposits.