Is it a stomach bug or something else?

So, I’ve got a bit of a situation. Usually, my immune system is pretty solid, so this caught me totally off guard. It started yesterday morning with some light stomach issues—I quickly jumped on it with activated charcoal, tea, and a strict diet. Honestly, I just figured it was stress-related since the last month has been an absolute nightmare. This morning, I skipped my usual breakfast and coffee just to play it safe and avoid any more bathroom trips triggered by nerves. Everything seemed fine, so I finally grabbed a sandwich and a coffee at work, and—surprise, surprise—it hit me. It wasn't even much, just a quick trip to the restroom, but after taking that charcoal earlier, the nausea kicked in hard. My boss sent me home, and now here I am venting to you guys. I’ve had to head back to the bathroom again; nothing major, but that constant, nagging urge won't go away. My temperature is hovering around 98.6, my throat is a little scratchy, and my head feels all foggy. The nausea comes and goes, but I’m not really someone who can actually throw up—I’ve only done it twice in my life, and both times were from serious food poisoning.
Right now, I’m sticking to a super bland diet. For lunch, I had some brown rice and a little bit of lean chicken cooked with barely any oil. I also made some light chicken broth that I’ll have later. I'm sipping on tea and haven't taken any more charcoal since this morning. Just trying to rest as much as possible, though it's tough because I live alone and don't have anyone to whip up meals for me, and I'm honestly starving.🙂
My question for you all is: how do you deal with this crap??

Everyone at my place caught some kind of nasty stomach bug that hung around for about three days.
It started out with non-stop vomiting and then just transitioned into diarrhea. Honestly, thank God we had some wild blackberries growing right in our backyard that we managed to forage;
it actually helped take the edge off those stomach cramps a little bit.