I actually find it quite insulting that you are going to use a condition you don't have and that people who do struggle with on a daily basis to get one over on a fast food outlet just because they didn't jump to your demands.
You didn't have your receipt, you didn't know what you ordered, you we rude and threatening to both staff and a customer - get over yourself
None of that is true (apart from the not having a receipt thing, which isn't worth debating, it's impossible to receive a receipt as standard). I had no interactions with customers. The only non-staff I had interaction with was a homeless guy asking me over and over for a pound while I was one the phone. Except that wasn't even a customer. All I did was say "I don't have a pound.". At no point was I rude to anyone least of all threatening.
I've been vindicated going back, talking to the manager and getting reimbursed. I think I was mistaken about that they might know what happened. Their staff (completely different crew to the shift I had problems at) were 110% professional and competent. The efficiency with which they dealt with it betrayed this was a regular mess they had to pick up.
We went through the records. There was no case of false memory. Although I was extremely foggy at the time in terms of things such as recall, there's zero evidence of anything I actually remember, rather than could recall at the time, being wrong. In fact, it was shown that the guy who refused me my food was wrong according the the records they pulled up saving me a SAR.
Though it does give me a bit of insight still. It doesn't take much study to understand that there are different levels of hypoglycemia. It's no doubt the level experienced by people with diabetes and much more easily is more severe. It's certainly right to be very responsible about that. I get it, in the common case like mine (most likely reactive), you're stupefied, in the case of diabetes it's life threatening.
At the same time however I feel a bit sad because the way I'm treated with this, I am sure it's people treating me how they have been. When we lose control or have less control we feel responsible but what if in at least one in ten situations actually the other party was wrong? We should never deny self responsibility but I don't think it's an excuse for people to throw themselves under the bus either. I think especially because that situation makes you quick to anger, then you feel guilty about your reaction, but it doesn't mean you were wrong or weren't wronged to begin with. I can understand it can also be embarrassing if you feel like you overreacted and like people have suggested here, it's normal to feel like you just want to bury it, especially if you don't remember entirely what you might have done. Personally I'd rather be embarrassed, ashamed or heaven forbid even exonerated than to not know but each to their own. Reality can never populate the void of the unknown with anything worse than my own imaginings.
And yes I do need to see a doctor for certain issues like suddenly abscesses and lumps in multiple localities across my body (lymph nodes primarily, in some cases the flesh didn't return) coming and going to the point of knowing I'm not a hypochondriac but that's no one's business here (especially as it's probably not diabetes but something else, probably infection, autoimmune or cancer, nothing some antibiotics wont cure).