1)
What is "Rinasi"?
1.
Radak: It is my scream, like "va'Ya'avor ha'Rinah ba'Machaneh" (Melachim I, 22:36).
2)
What is the meaning of "Dalosi Me'od"?
1.
Malbim: This is the affliction and crushing of the person himself.
3)
Why did he say "Ki Amtzu Mimeni"?
1.
Radak: I cannot overcome the king and his nation who pursue me. Malbim - this is his external affliction.