I appreciate your honesty.
I am sorry; I am unaware of your age. However, Cancer or Lymphoma
does not come in my first assessment. I would rather look at it as a lymph node enlargement secondary to viral or bacterial infection of the upper respiratory tract
Moreover, cancer and Lymphoma do not occur within days. The fact that it is sore and that it hurts you makes it more likely to be an inflammatory pathology rather than a cancerous one.
You would benefit by a course of antibiotic. Just take the Hypochondriac thinking out of your mind.
To my knowledge, you are perfectly fine and should do well in a few days.
Get well soon and wish you a long healthy life.