"My kitchen sink stop working when I turn the side spray thing on now no water at all will come out of sink in kitchen, everywhere else and even the dishwasher still work"

Shut the water off under the cabinet ands open up the faucet. Remove the cartridge and check and clean the inlet ports. While the valve's open place a pan over it and turn the hot water on to flush out the supply. You should have a full sream when you do this. If not let me know. Good luck, Tom