I believe you have hurt yourself there somehow and it probably got infected. Your " right gland" on your neck being swollen is your right tonsil which became such because of the infection as tonsils are a true germ barrier. Your swelling should reduce once your infection is gone. And for the infection to be gone you need to be on antibiotics. Have a germ identification done and then an antibiogram...It will tell you what antibiotics to take to get rid of your problem. Also talk to a doctor.

Good luck!

How do you mean I hurt myself? Also, whats your opinion on my condition?

You said "for about a week now i've had this canker sore on the upper part of my mouth"...I thought you referred to the palatine surface and I thought you might have hurt yourself when eating, like when eating toast or something hard and then it got infected...

If I didn't understand correctly, please explain what you meant to say by "canker sore on the upper part of my mouth".