Since I posted this article they have added 2 "rescue" methods:
- Child pays for parent
- Replace by fee
With the RBF you have to enable that flag when sending the transaction, usually enabled by default, so you can replace the TX with a new one.
Otherwise you can use the other methid in which a 2nd transation is sent that increases the cumulative fee for the first one.
Look into them and see if your wallet can process that:
See if your can rescue your transaction.
Thanks child pays for parent worked with heavy fees.. the bittersweetness of mass adoption.