I Felt Nauseated And Experienced Severe Abdominal Pain

Hi, I am 24 years old, female from the Philippines. For three weeks now, I have been experiencing diarrhoea, and that is everyday for 3 weeks straight. At least twice a day. And that's always in liquid form. Before that started, I got a high fever due to my Tonsilitis and I took an antibiotic for that as prescribed by my doctor . So back to my current state. Today, I have gone to the bathroom 5 times already. And earlier, I had to be checked into the mall clinic because I felt nauseated and experienced severe abdominal pain . That is the case usually when I enter into a building or room where it is airconditioned/cold. I don't know why I kept on experiencing this but I'm not liking it anymore. I'm worried about my health already.