hello thank you for trusting HCM Dear single time spray on legs may won t cause above symptoms.but acute poisoning can cause body surface irritation and abdominal cramps anxiety,breathing difficulty,coma,blue lips or,fingernails (rare),diarrhea,dizziness,drowsiness headache,Irritation in the mouth and throat low blood pressure,nausea and vomiting (may vomit blood),weakness.so your exposure accure one year back probably your symptoms may be due to viral Fever and gastritis etc.. please consult your doctor he will examine and treat you accordingly. I think I answered to your question if you have more questions feel free to ask. take care