I think you can recieve it on 8 hrs because its medium priority like mine. if you got still unconfirm after the 8 hrs you can recieve back your transaction 4 days before it came back..
It 24 hours bro (I'm not sure). It got confirmed eventually tho.
Bro just wait 4 days it will arrive back to your wallet. if still didnt confirmed just like mine bro i send bitcoins to online wallet then after 2 to 3 hrs its still have no comnfirmation until 24 hrs so i just wait the confirmation after 4 days the transaction is rejected and your bitcoind send arrive back to your wallet.
I do again send the bitcoin with the low fee but i was changed the transaction fee per kb to 1. after that its working again even my fee is low i cant send it and recieve but not fast 1 or 2hrs will arrive and sent...