Thanks for this question. It makes sense for you to see a doctor
as it is difficult for me to understand exactly what you are describing. There are several conditions that can present with acute swelling and bruising similar to what you are describing. Most of these are treated by an ear nose and throat surgeon
(AKA otolaryngology-head and neck surgeon). Necrotizing sialometaplasia can sometimes present in a fashion similar to what you describe, and it is usually a self limited condition. Also, some trauma and other infectious diseases can cause some of the same symptoms that you are describing, although there is a broad range of possible presentations for each. Unfortunately, there are many tumors that can also present in this way, some of which are malignant (ie, cancer), and you should therefore be examined by a doctor to make sure that you are ok. Things in your favor are the fact that it appears to have come on suddenly, which is perhaps slightly unusual for many tumors of the head and neck. Your ear nose and throat surgeon should be able to help you determine what the next best step should be, so please speak with your doctor.