quickly - please note that I am not a medical professional.
- I'm not seeing the level of structural change to which you're referring, but that doesn't mean what you're feeling - and the pain you're experiencing - isn't valid.
- have you had imaging (CT/MRI) done on your maxillofacial region? Having a medical practitioner palpate at you, certified ENT or not, without a clear image of any internal structural concerns, if insufficient IMHO given the length of time you've experienced this. If there's anything to worry about, a CT scan or MRI (more commonly a CT) should shed enlightenment on the issue. I don't wish to alarm you with possible aetiologies (some of the possibilities are esoteric and I don't wish to scare you; that old adage about physicians hearing zebras' hooves when it's really just horses) but taking radiology (not an x-ray) of the cartilage, bone, soft-tissue structures, any acute or chronic damage or displacement of such in your face - which are then reviewed in-depth by a radiologist and then an ENT/facial plastics surgeon - will help immensely in determining if there is anything causing this pain and the symptoms you describe. I am definitely not discounting the fact that you've had this pain for some time now.
I'm not sure where you're located, but if possible and if your insurance covers it, I would personally head to a hospital emergency department as they specialise in traumatic injuries and have all the equipment to immediately get imaging & tests done. I would omit giving a detailed account of why you got into the initial mishap, just that you injured your face X weeks ago, and a clinical list of symptoms since then with an emphasis on the increased pain, as that is worrying.
Storytime: A couple months ago I slipped on a staircase & hit the side of my face. I am very self-conscious about my appearance, but it didn't seem to have impacted my appearance significantly other than a bruise and a bit of swelling. Days later it got worse and there was increasing facial pain (plus a clear drip out of my nostril which I equated to worst-case scenario, CSF drip - thankfully it was not that) and headed to a hospital emergency department 5 days later. They immediately sent me to get CT scans and other tests, and figured out what was going on based on the imaging and some very skilled physicians who deal with trauma injuries every day, then referred me to their trauma ENT/plastics department for follow-up - who reviewed the CT images as well as conducted a thorough examination. Without looking at what was going on inside my face/head, I wouldn't have received a proper diagnosis or treatment.
One wild hypothesis as you've repeatedly mentioning the sudden formation of a 'jowl' (please do not take it badly if I say I can't see it, and I am a self-critical sort) - one time I noticed what seemed like a sudden asymmetrical onset of a 'jowl' (droopy swollen bit) on one side of my jawline. It turned out to be an infected salivary duct (can happen due to dehydration or myriad other causes, including salivary gland calculi - literally a stone blocking the duct in your inner cheek, causing a stoppage, which may lead to eventual infection). 10 days of antibiotics, presto, the 'jowl' was all gone! The physician even said he'd had the same thing once. Other causes of unilateral and bilateral swelling around regions with lymph nodes (eg under neck, 'jowl' region, side of face) can be a reaction to anything from an HSV-1 (cold sore variety) infection affecting a nerve to impetigo (really), which can easily go overlooked and cause swelling as an immune response. Once the underlying condition is treated, the swelling or sagging or however one perceives it subsides as well (and no, it doesn't necessarily have to be the stereotypically 'lumpy' lymph nodes - presentation can be wildly variate). I hope you find the answers you need and help with your pain. Again, I'd strongly suggest getting CT/MRI imaging taken (CT would likely be the first option) so the professionals treating you can have an idea of what is happening internally. Best of luck!
PS - my initial thought was jaw dislocation due to your description but that's usually quite obvious. joint changes should show up on imaging though - it did on mine although minor (and am healed now, mostly)