First things first: I'm not a doctor. I'm sharing what helped me. If you have new or severe symptoms, please talk to your doctor.
I think about the "bucket", not a single culprit
The most useful concept for me has been the histamine bucket: your body can handle a certain amount, and when it fills up, the reactions start. A bad day rarely comes from a single food. It's usually a sum: something I ate + poor sleep + stress + the time of the month.
This freed me from obsessively hunting for "the one thing to blame". Instead of asking what exactly ruined my day, I ask: what can I take out of the bucket right now?
What I actually do on a hard day
- I keep food as simple as possible. Single-ingredient, fresh, plainly cooked. Nothing aged, fermented or left to sit. It's a rice-and-chicken day, not a day for experiments.
- I drink water and stay patient. Forcing things solves nothing. I let my body process.
- I cut back on what I can control. I reduce caffeine, skip alcohol entirely, and try not to overdo it physically.
- I write the day down. A quick note on what I ate and how I felt. Over time, this showed me patterns I couldn't see before.
About being "wired and tired"
The strangest feeling on bad days is being both exhausted and buzzing in your head at the same time. For a long time I thought it was anxiety. For me, it's histamine reaching the brain — and it feels completely different once you know what it is. I don't panic at it anymore. I know it passes.
A bad day isn't a failure. It's just a full bucket. Tomorrow it empties out again.
Most important: being gentle
I've stopped arguing with myself on hard days. It's not that I "did something wrong". Sometimes it just builds up. I lower my expectations for that day, do only what's strictly necessary, and remind myself that tomorrow is a new day.
How I prepare my "kit" for hard days
Everything I can, I prepare ahead of time. I keep a few portions of safe food in the freezer so that on bad days I don't have to cook from scratch. I also have a short list of things that calm me down — an easy walk, a tea I tolerate, an evening without screens. When it's hard, I don't have the energy to improvise, so I let my "rested self of today" take care of my "tired self of tomorrow".