Hello~It sounds like you have an infection, that would be the reason for the swollen lymph node and the foul taste in your mouth. I suggest going to the ER and be checked for a strep throat.
In the meantime, start garggling with salt water and vinegar, this often helps with infections and can make the strep throat less painful. But, as I said, you really do need to get to the ER as soon as possible.
I hope you feel better soon. God bless you.
See a doctor at the ER for a strep throat test.
You may do a gargle using 1Tblsp salt in a tall glass of warm water for now.
At least see the nurse at the college for more direction.
Best wishes,
Niko