ccancandi,
Christine has provided an excellent set of recommendations and you should follow through on all of them. She is also probably correct with her thoughts on infection. So try not to worry to much.
Also ask your dentist about recommending ENT's as a potential follow-up now so you can schedule an appointment as soon as possible after your dental visit. (If your dentist feels a follow-up is warranted.) You can always cancel your ENT appointment if its not needed.
Hopefully, this is something that can / will be cleared up quickly. However, if it does turn out to be OC, you've found the best place for advice / support / and information.
To answer your questions on symptoms -
Excessive night sweats - waking up listless and soaked with sweat. Drenched pillow / tee shirt / sheet
Loss of appetite / weight loss at exceptionally high rate
Feeling physically and mentally drained
Sore / Stiff neck and jaw that did not loosen up through the day.
Bleeding from tongue
I'm sure that there are variations of symptoms for different people.
Can I give you some advice? Start at the beginning. Visit your dentist. Follow-up with ENT's. Take this one step at a time. Be smart about your choices. Ask questions. Get second opinions.
Good Luck