Hello, Welcome to health care magic.
First of all i would like to ask u that since when are you suffering from such condition? Do U have fever
along with it? Are u suffering from recurrent throat infections? If yes this might be an infection acute or chronic. Get your basic blood counts such as CBC and ESR
done. This will give an fair idea that what is the actual problem. If u have lost considerable amount of weight in 2 months and your ESR is raised than u require to do an FNSC done which will give the exact picture with what kind of infection you are suffering. Rule out any dental problems.
Do not panic since any swelling with considerable amount of weight loss
need not be cancer. But get it diagnosed and start with the treatment since prevention is always better than cure.