Hear me, answer me – that’s the two halves of this psalm. They serve to step up the intensity and urgency of the prayer; put the screws on God to shuffle this prayer to the top of the priority list.
God gets a gazillion emails a day marked urgent with a read receipt.
It’s a middle of the night prayer, when everything seems impossible. At one point David asks the morning to bring a word of God’s unfailing love. Seems like there ain’t such a word coming to him now as he prays/panics into the night.
His utter lack of options for whatever problems he’s facing focuses him on having no claim to God’s grace; being totally undeserving. But also how totally reliant he is on it.
I think God probably loves it when we throw his character back at him this way. “Woah, this will certainly display your unfailing love” is a pretty positive way to react to bad news, when your own resources abandon you.