Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. If you have symptoms of night sweats, weight loss with chest pain with evening raise of temperature then there may be chance of tubercular pleural effusion. Your ESR also elevated it is correlating. other possibilities like hypo proteinemia or cardiac failure or liver failure or sypneumonic effusion may possible. Until examination is done it is difficult to say what it is. need to drain fluid under ultrasound guidence then sent for protein,sugar analysis and treated accordingly. Please consult your doctor he will examine and treat you accordingly. Hope I have answered your query. Let me know if I can assist you further.