Kid, in two weeks, you could be DEAD. And the advice you're getting right now, from "experts" at the gym, could be what finishes you off.
The people at your gym are probably not the brightest bulbs in the chandelier. The lingo and "analysis" they're throwing at you sounds pretty iffy and faddish, to me. A diet that is seventy five percent fat & protein is EXTREME. On a diet like that, you should be monitored continually by a physician.
And why is your body going haywire with all these sensitivities? It would not hurt, at this point, to eliminate enzyme detergents, artificial fragrances
(particularly air fresheners), and pesticides from your home. Any or all of those could be interfering with your body's natural self-regulation.
Plenty of people are allergic to Avocado, and so maybe you've got a good instinct in that regard. And nuts are another class of foods which people frequently cannot tolerate.
Most of the better, safer things that would keep you going during the day are going to be carbohydrates. -
complex carbohydrates. Apples, celery, oranges... all these are good snacks. Apples and oranges naturally help keep your blood sugar on an even keel. And celery is naturally anti-inflammatory.
Where I'm from, the old wisdom was that "a big-ol' mess of greens" was what was needed to sort-out problems of the digestive system. There may be some truth to that. This time of year, medicinal greens are going to be less easy to find. But disinfecting a bunch of parsley
(wash in a vinegar and salt solution), and using that as the base for a
chopped salad, would not be a bad thing. Me... I'd prepare the parsley, and eat it plain, as a medicine.
Steaming Swiss Chard is a good idea
(I used to roll-up steamed chard leaves, and take them to work, as snacks.). I also like
Blanched Broccoli en Vinaigrette (all these greens should be accompanied by a bit of olive oil).
The fact that the vinegar gave you instant relief should tell you something. And as for your yen for lemonade... YES!!! Just sweeten it with Stevia (the unadulterated kind, from a nonprofit health food co-op). Or learn to like
unsweetened Lemon Water. My friends from aristocratic Louisiana families had matriarchs who never drank water without a bit of lemon. Apparently, it worked for them, and scientists are just-now beginning to understand why.
Grapefruit, peeled and eaten like an orange, is a good snack, and very low on the Glycemic Index. When I'm on the road, I love canned Red Beans, with a bit of olive oil. I travel with a collander, and rinse them, add S&P and olive oil, and have a high-fibre, high-protein food that needs no cooking
(at 69 Cents a can!). A can of Red Beans, a couple of grapefruits, a couple of lemons or limes, and that's all the food I need, most days when I'm driving cross-country, checking on our properties. Something else I've learned is that a bottle of V-8 really picks me up, and helps me sleep better in hotels
(all the Lycopene, probably). So, even if I'm at a motel in the middle of nowhere - nowhere near a juice bar - I have that resource, at the nearest grocery store.
But speaking of juice bars... Fresh Carrot juice may be helpful, in dealing with whatever's causing problems in your gut.
As for High-protein snacks you can eat at work (but not soy, or chicken, or beef...), maybe canned tuna? That's what bodybuilders do. Or, you could prepare salmon... or take (depending on your tastes) canned sardines. Then again, why not prepare some herbed scrambled eggs?
Berries are not in season right now. But deeply-colored berries are highly medicinal.
Pomegranates DO seem to be in-season
(I think I saw them in a grocery in Mississippi, on-special for a Dollar each). Pomegranates count as berries. Prices on
Blood Oranges are good, too, right now. Blood oranges are deeply-pigmented, and so I'd count those as berries, too.
The gist is that I think that,
right now, you need the medicinal value offered by
deeply-colored fruits and vegetables (and fresh herbs, if possible...), more than you need to worry about
"going low-carb".
Here's my favorite resource, for information about
which foods are healthiest:
The World's Healthiest Foods