Weight loss and sweat at night. are these the main and common symptoms of hiv?

Not necessarily: While night sweats and weight loss are common symptoms of chronic HIV infection, these symptoms are very nonspecific. This means that other infections like a severe flu or tuberculosis or even cancer may cause these symptoms. Anyone who has HIV may have different symptoms/manifestations of their hiv. While most may have nights sweats and/or weight loss, some may have fevers or oral thrush.