I have renal cyst. And my daughter was playin with me and kept kickin. My back. Now that kidney is really hurting. Whats goin on?

Could be the cyst. Your kidney cyst may not be the reason why you have pain. Reasons can range from muscular to bleeding in the cyst to kidney trauma (usually happens with blood in the urine) if your pain persists seek medical advice and imaging please.
Cyst or rib. Your daughter may have bruised or fractured a rib. Conversely, the cyst may have ruptured, if it is very large. Then agaig she may have bruised your kidn ey. Get it checked if the pain persists.