Open that wallet using Electrum, you will notice the Unconfirmed transaction, but you can't do much because the wallet does not support RBF.
I guess you are referring to blockchain wallet; in electrum, RBF is available but you have to use RBF before broadcasting a tx. Since you initially used blockchain wallet, the tx wasn't RBF opt in. Either way, waiting couple of days would solve the problem too. You can remove tx onve it passes several days with unconfirmed status.