There are many different potential cause of a swollen and tight throat, and so the first step would be to go see your primary care doctor
for an evaluation if the symptoms persist.
Throat cancer is not common, especially in those who do not smoke. Although throat cancer can lead to many symptoms, including pain with or trouble swallowing, these symptoms tend to come on a bit gradually. Therefore, if your symptoms are relatively acute in onset, then this is probably not what is going on.
Many cases of discomfort and tightness in the throat are caused by common viral infections (like the common cold) or common bacterial infections (like strep throat). These will probably be the first things your doctor will want to rule out with the physical examination. Other common (and relatively benign) medical causes would include acid reflux
Allergic reactions can also cause discomfort and tightness in the throat. This can be dangerous, because the swelling can lead to trouble breathing. Therefore, if you have any trouble breathing, or any swelling of the face or tongue or lips, these could be signs of a serious allergic reaction, and you should seek immediate medical attention. Book an appointment with your doctor today!