You DEFINITELY have the right of reply on this, so use it and don't feel badly or concerned for your actions. Unless you speak up for yourself, this individual will continue to potentially ride roughshod over your potential and future opportunities, by causing serious damage to such things, with his unproffessional attitude.
The support you have from at least one other faculty member, means you can do this, because if they encouraged you to do it, you must be in with a good chance of being heard, instead of the senior people at your facility, closing ranks and covering things up.
You must however remain as proffessional as possible. Don't lose it and don't act like someone, that got told something once you didn't like and wants some petty justice, because you're not that person, you're someone that is being to a minor extent, shown abuse, by having someone devalue and unjustifiably act against your educational work.
Make use of your right to reply but be mindful of trying to be strong, assertive and using your voice in the right way.
As for your problem the other day. It could perhaps have been Kidney stones, assuming they had by now either broken down or been passed in some state. However it may have been a reaction to something to ate, as things like food poisoning can last as long as a week, possibly a bit more, so if you'd eaten anything different to usual, it could have caused it, or perhaps youy just ate something that was packaged, that may have been produced poorly, kind of one of those ones that slipped out of a factory without being thrown away as spoiled, or perhaps damaged in some way where things like Germs and air could get at them, devaluing the contents prior to consumption.
Other scenario is, you had some kind of refectory food that was poorly prepared. Perhaps someone made a mistake when cooking or used contaminated ingredients, maybe without realising.
So be aware of that possibility. You may well have had what's happened pass now, so touchwood, it won't happen again.
GOOD LUCK on that and the other thing as well. We ARE here for you and we WILL support you. Be strong, beleive in yourself and don't let anyone or anything spoil the good things about you or the potential you have. You are intelligent, have good levels of personality and a bit of emotional beauty. If you can get the life together that you could start to acquire very soon, assuming the good things you say are being offered, start to happen, then you'll be in a good life place within the next 3-4 years probably.
I know it's hard right now, I totally empathise with you and totally realise you're under constant pressure from many factors, that feel like they're eroding confidence and self worth, but I also know you're capable of standing tall, standing proud and showing the world who you are and what you are truly worth, which I believe is a heck of a lot misses.
It's simply a case of what you are willing to believe about yourself.
Don't be afraid of yourself, because there's nothing and I mean NOTHING to be afraid of
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So that's worrying me a lot! I even wish I didn't go. But the person in charge said they'll take it up with the dept. dean...and something might happen. I doubt it though. *sigh*