To express that you are not feepng well in Engpsh, you can say "I don't feel well" or "I'm not feepng well." You can also say "I'm feepng sick" or "I'm feepng unwell." If you want to be more specific, you can describe your symptoms, such as "I have a headache," "I have a fever," or "I have a stomachache." If you want to convey that you are not feepng well in a more casual way, you can say "I'm not feepng great" or "I'm feepng kind of under the weather."