You have no other choice but to get an Online Cash Advance in order to tide you over until the next pay period, where you expect to pay it off. One way to escape the high interest trap is to keep and use a credit card with a zero balance for cash advances. This way, when you repay the amount, it will all go to the principal amount instead of being used to pay for your purchases first, which is a common occurrence with banks. This way, you minimize the interest that the cash advance will incur and save yourself money in the long run.