One thing I noticed is that my From adress (my Bitpay wallet) and To adress are exactly the same, meaning I am sending Eth to myself. Is that even possible and how did I manage that, I have no clue, I suppose "copy to clipboard" moment was key.
Yes.
to
It's possible to send crypto on the same address, however can you export your ethereum wallet and import maybe to metamask? If can, then just export the private key/json file that addresses and try to bump the fee on metamask.
Or you can send 0 ethereum to your address with the highest fee to cancel the previous transacton.