What Do Swelling Under The Tongue And Difficulty In Swallowing Indicate?

Swollen underneath tongue, chin, severe pain, hurts to open mouth, chew, difficulty swallowing, pain so severe I can feel it in back of my head (headache). This follows dental surgery 25 days ago to remove teeth (front bottom), two implants, and two bone grafts. Also follows 5-6 weeks of flu-like symptoms (respiratory, high fever, chills, nausea, vomiting, diarrhea, etc.), but doctor tested me twice (two weeks apart) for flu type a and b and tests were negative. Doctor concluded some type of respiratory infection that mimicked the flu that had to run its course. I was on 3 different rounds of antibiotic before and after the dental surgery, which I finished clindamycin last Thursday, but this 'sore throat feeling in the glands' began Tuesday (two days before finishing third round of antibiotic. I am diabetic due to severe pancreatitis so diabetes behaves like Type 1. I am totally insulin dependent. I take huge doses of levamere (60 units a.m. and 50 units p.m.) and use Humalog sliding scale (high scale used at local hospital). I take Lyrica 100 mg 4 times daily for severe neuropathy for years now, and synthroid. Today I saw my doctor's nurse practioner who diagnosed my swollen, painful mouth as post dental surgery trauma. Tomorrow I will see dental surgeon who is unhappy with the speed at which I am healing (he's not the only one!). I have tried ice, heat, Tylenol, ibuprofen. Thankfully the nurse practioner gave me a few hydrocodone (7.5) to take today until I see dental surgeon tomorrow. I am a 56 years old woman and I live in assisted living so my diet and my medication are handled professionally. I am very afraid that my dental surgeon is not going to be able to diagnose this tomorrow and since last Tuesday the condition only worsens no matter what I try. Even the hydrocodone is not completely relieving my pain and what little help it does provide only seems to last for about 2 hours. (After the pancreatitis and complications, I have a high tolerance for pain meds). My doctor and I rarely choose the narcotic pain relief route unless we absolutely have to (i.e. following the dental surgery, I took 3 days of Percocet 10s. Since then I have only used Tylenol and Ibuprofen (neither of which are any help right now--they were helping until this swelling began last Tuesday. I am in tears as I sit here describing all of this. I realize my case is complicated: I had to move into assisted living 5 years ago when I started having TIAs and could no longer live alone. The professional care I receive here has made the TIAs almost non-existent. When I lived alone, prior to coming here, I did not take care of my diabetes. Now I do. What do you think?