Need Financial Cushion

Over the last year or so, I've been paying off part of my hospital bills. Today, an unexpected call with debt collectors required me to pay off the entirety of the $700 remainder this month. I can afford that in isolation, but I can NOT afford it on top of my other bills such as insurance and rent. My job simply does not pay enough to enable me to safely meet my bills this month.  I have set the ideal goal at $1000 to be on the safe side. If we go over that, I'll be thrilled. If we go under, I'll understand. I will likely be withdrawing the money in a little over a week, so the withdrawal can process before my rent is due. Thank you for whatever help you can offer.