Facial swelling and bloating

Are you consuming high levels of sodium?

Oh jeesh, hon, hugs. I am so sorry. I do not know the answer, obviously, but tests and things to try? This is what I'd suggest.

1. Get a new doctor if there is any way possible, because they are obviously not good for anyone not in a tiny range of average.
2. Celiac disease testing might be helpful. Here's possible symptoms of celiac disease: digestive issues, extreme fatigue, depression, difficult either losing OR gaining weight, vitamin deficiencies (there's a few hundred, all told, and some are rarer, so bloating may be in there - it impacts a LOT of bodily systems). These are literally some of the most common, basic symptoms, too, so...your doctor fails utterly if they never even suggested getting tested for these. The tests look for reactions to gluten that you are eating, however, so you have to keep eating gluten before testing for it to be accurate.

3. Testing for auto-immune diseases/disorders, period. While there an be a lot of wide ranging symptoms for auto-immune disorders, fatigue, gut issues, and depression are very common to many of them. Inflammation of the brain has, in recent studies, been suggested to contribute to depression. Auto-immune diseases increase inflammation in the body, so it's not surprising depression would be common to many. Another oddball commonality in auto-immune disorders is vitamin D deficiency. Research hasn't shown if it's more an effect, or if there may be something else in the body causing low vitamin D that contributes to causing auto-immune disorders, but there IS correlation. Honestly, I would jot down your symptoms (including the bloating, possible even specific location of bloating), and then google them along with words like auto-immune and/or disorder, symptoms, disease. And literally see what comes up.

I have a few rare disorders, so does one of my kids. Nearly all of our diagnoses literally got diagnosed because we asked to get tested (as opposed to the doctors suggesting it) and we got most of our information from either support groups or from doing exactly the above advice, then going to the doctor and asking to be tested (and had our guesses validated with testing). We had a couple things we tested for that we didn't have, but so far, out of 7 disorders we have collectively turned out to have (confirmed via testing), all 7 of them were ones we asked for testing for. Only 1 of them did the doctor suggest testing for (when our purpose for coming in was to GET testing after online research).

4. Allergies - allergies can cause gut issues and bloating, even if they aren't bad enough to cause itching and hives, sometimes. Might be worth getting food allergy tested. Also might be worth doing an elimination diet (Dr. Joneja has a fairly well recommended book called 'dealing with food allergies' that talks a lot about food allergies, testing, and so on - she also deals with an allergy-related issue called histamine intolerance, and diets for that, in articles online that can be found). We don't have accurate testing for almost all food intolerances, or chemical sensitivities, so almost all of these can only be found through elimination diets.

Some common intolerances/sensitivities I know of that can cause gastro distress and/or bloating:
lactose intolerance - lactose free diet required
fructose malabsorption - requires a low FODMAP diet
sulfite sensitivity - this is a bleaching agent and a preserving agent. It is commonly used to bleach salt to a white color, bleach pistachios shells, preserve lemon and lime concentrate, dried fruit, wine...
intolerances to various thickeners - xanthan gum is the big one that people are known to have trouble with, and with its popularity in GF foods, it's become more popular in the mainstreem foods, too. But guar gum and various starches can sometimes cause intestinal issues, as well.
annatto - it's an orangish-yellowish seed that is used as a dye. Can be found in all sorts of foods and is a common thing to be intolerant to. Can be found in all sorts of things, like butter, cheese, brownish or yellowish liquids like coffee creamer, etc... It can be tricky to hunt down, because there are some things where, if it is in low enough amounts in the USA, it won't have to be mentioned on the label (I believe some butters are in this category, to keep the yellow color uniform).

Most of these types of things have support groups or websites that you can check out to get an idea of what foods might be problematic, if you are looking to see if they match with anything you are eating and having trouble with.

You need a different doctor. An allergist is a good idea. Don't mess around with potential allergies--some can be very dangerous.