Recovering after a rough week with an allergic reaction

I had an allergic reaction where I got a bit red on my body on Tuesday and I have not been feeling that great this week with a lot of strong headaches on Thursday. I felt a lot better yesterday so not as worried now, where I had multiple reasons for feeling worse.

1. I have been testing a new supplement with dried berries and also had a smoothie on Tuesday with a lot of berries, so there might be something with that.

2. Before the most, I have done is two max effort 20-sec cardio in a row, where I did three last Friday and then four on Monday. On an assault bike with 40-60 sec slow recovery between.

3. High stress at work where except for when I started I have only been in the office three times a week and not full days. This week I was responsible for educating a new employee so I have been there for five days. This goes back to normal next week.

I have been reducing exercise after this and I'm in control of all these three so it shouldn’t be a problem, but a bit scary as when I first got sick I got red on my body and then swallowed up and had to go to the hospital.

Thanks. I planned to go for my first mountain bike session for the year today as it's warmer here than normally this weekend, but nope. Feeling worse after my bowel movements so it's just sauna, epsom bath and a nature walk today instead.