I sent a transaction hours ago and it seems stuck. Many blocks have been mined, but it is still unconfirmed.

It came from a segwit address: http://explorer.lbtc.io/transinfo?txhash=e8199d715f349c711b96008ab7080087c2876a42bfc3aa0c24c70bda57ce5e53



Any ideas how to confirm or maybe cancel it and send it again?

I successfully broadcasted a child pays for parent transaction with a much higher fee, but the block explorer doesn't find this tx id too.

Anyone know what is wrong?