Food allergies, iin?!

I have food allergies, some of which could probably kill me. Most of my allergies are fairly recent. When, I was a child I was only allergic to four things: pet dandruff, mold, pollen and something else. At some point, I found myself acting strangely to cucumbers and raw carrots. I didn't know that it was being caused by a food allergy so I did nothing. In my early teens, I had about two scary reactions. One was to raw carrots and I thought it was caused by MSG and the other was from black beans. The years leading up to my current age, I gradually had more foods that I could no longer it. Last, fall/winter and the past months of this year, I find myself constantly having allergic reactions. I've had to become a vegetarian as a result with not much variety in my diet. I can't eat any form of meat. I could probably have soy, but soy meat is usually made with ingredients I can't have. My reactions to meat have left so far permanent "problems" in my mouth. I once ate a soy product and I had a reaction. It left a bump near the back of my throat. The last time I ate shrimp, it left a discoloration on my tongue. Whenever I get a allergic reaction, 1. the bump on my tongue will grow hard and yellow. 2. the lump near the back of my throat will become irritated and swell or 3. near my gum line on my cheeks, bumpy lines will sprout and tighten. Making me feel very uncomfortable. My mouth will also become numb and things start to swell. My throat has never swelled, thankfully, but it can get very irritated.

I don't know what to do. I'm terrified of trying new foods, because of scared of a allergic reaction and being low on my anti-histamine. My family, I feel doesn't take it seriously enough. I saw a allergist a few years ago before I had so many allergies. He was rude and didn't believe my allergies nor did he test me for things that I was specifically allergic to.
Here's a list of foods I'm allergic to:

- sunflower oil, safflower oil, soybean oil, canola oil, strong olive oils and possibly sesame oil.
- raw carrots, cucumbers, most beans (especially if they come from america or mexico), butternut squash, zucchini, possibly pumpkin, possibly cooked white rice or brown rice, fried russet potatoes, tomato paste, fried food in general, possibly buckwheat, most cereals, mushrooms, corn starch, possibly spinach, oatmeal cooked on the stove, possibly broccoli, certain grains
- bananas, mangos, cantaloupe, dew melon, concentrated orange juice, strawberries, possibly raw: apples, peaches, plums and nectarines, pomegranates, possibly cherry juice, possibly raspberries
- red meat, poultry, seafood, fake meat (vegetarian meat), fried or scrambled eggs, deli cheese (comes in contact with deli meats)
- MSG, artificial sweeteners (aspartame, Sucralose,etc), BHT, BHA, TBHT,etc
- domino organic cane sugar, possibly honey, possibly stevia, gum
- ginger, possibly paprika, possibly cinnamon, and black pepper

I might of left some things out, but forgive me because it's hard to remember everything. As you can see, my choices are limited. I was thinking that maybe my allergies are caused by my country's unhealthy foods. There's pink slime in the meat and most of the foods contain GMO's etc. I went to europe awhile ago and I didn't have any problems with most of the food. I could eat a fraction of what I can't have now. I felt healthy, but when I came back to my country that's when it started to get really bad. I don't know what to do anymore and I feel like a freak. This is frustrating and very scary. I need help! IIN?