Which wallet are you using?
It may be possible to re-broadcast the transaction with a higher fee so that it confirms. This feature is called replace-by-fee and as far as I'm aware Electrum and other modern wallets support it.
Otherwise you're out of luck. The transaction may stay on the mempool for a very long time until it is confirmed.

You could try to use an accelerator which will include your transaction in the next block that a pool mines, but due to extremely high network congestion they're probably unavailable.