My wallet has enough funds to make the 3 transactions above, there's no ongoing pending transactions before I made any of the 3 payments. I don't understand why the 'Unconfirmed Parent' occurred
Most probably, in transaction 3, you are spending the fund received in transaction 1 or 2.
How do I do a CPFP?
Since the transactions have been flagged as RBF, there is no need to CPFP. With CPFP, you create a new transaction and that will cause you to spend more money on transaction fee.
Just bump the fee.