Pending transactions affect the amount you're able to spend on your card (your available credit), but only posted transactions will show up in your Current Balance. This means that although you're not able to spend the amount of the posted transaction, you won’t be charged interest on any purchases until they are posted and no longer pending.
New transactions take a few days to show up on your activity history, so as soon as they are fully processed and become a posted transaction, they'll be reflected in your Current Balance.