Anaphylactic shock to Yucca

Hv, I am scared. I am the one that has been posting for months trying to heal myself and my family from toxic mold exposure a year and a half ago. I feel like I have the respiratory symptoms under control and maybe even the candida a bit, but my food allergies are out of control! I am allergic to most foods and now most vitamins/supplements. I thought I was improving with the grape bitters and homemade coconut kefir, but I ate a carrot today (which I have been tolerating) and had a mild reaction to it so I took the yucca root that I just bought since I am allergic to quercetin...BAD idea, but it is literally just yucca root in a gelatin capsule so I thought it was safe. Immediately, I was dizzy, nauseas with diarrhea, swollen face and tongue and felt like someone was holding my throat. I drank a ton of water and tried breathing through it. I am petrified to go the hospital as they will give me steroids and God knows what else. I don't know what to do next. I found a 5000mg Vit C powder that was just ab sorbic acid ...should I try that? I have tried the amla and jiaogulan before with allergic reactions to both. I ingested the yucca about 3.5 hours ago so I am praying I am on the down hill now...I am still very lightheaded and nauseas though. Any help is GREATLY appreciated!