Hi Welcome. I have gone through your query. Based on the information, I feel it might be flu. It is usually viral in nature and require only symptomatic treatment. I would have treated you with paracetamol 500 mg twice daily for two days. Along with that I would have given you capsule omeprazole 20 mg, to be taken empty stomach 1/2 hour before breakfast for 5 days. Probiotics like sporolac or ecobion will be beneficial. How many episode of diarrhea you had? How was the stool, it s consistency, was it watery? Apart from the drugs, kindly avoid spicy food, smoking, and alcohol. Drink plenty of water. Especially warm water. How is the climate at your place? Kindly avoid sitting in air-conditioned room for long, that may cause lip to crack, keep yourself hydrated, use lip balm, like vesaline, will be helpful. You should be fine with this measures. This provisional advice provided by me is based entirely on the input provided to me. I would suggest examination by the doctor. I hope this suggestion might be of some help to you. Take care.