Side effect of fasting or virus?

[chillyprawns]

Okay so I was fasting for all of today until my evening meal. Sometimes I do this if I know I'm going to be really busy, and then just enjoy my food in the evenings

I had a swim booked so did that for about 30 to 40 mins. Just a medium lane swim consisting of sidestrokes and backstrokes

Anyway, I had a headache and twitchy eye getting out. Came home and dinner time was due but I just felt so sick. Like pregnancy nausea sick. Not pregnant

It got progressively worse. My stomach absolutely was in bits. It felt like it was twisting and I vomited

I feel a lot better now I've been sick but no appetite at all.

Is this a viral infection or just the exercise? I mean, it's just a moderate swim session. Surely I cannot be that unwell from just that?

For clarification, I've never done a fast and swam before. But thought it would be fine during a fast

Bumping

Sounds similar to when I have a migraine. Hope you feel better soon

Its not really a "fast" is it, it is just how you eat if you are busy. I don't think it would cause any problems, it is a normal day at work for me for decades

I did a sponsored fast as a teenager and ended up very unwell, unable to eat and vomiting. I think it was the fast/exercise combo. 30-40 minutes is a long swim on no fuel.

Busy day.
No fuel.
Went swimming.

Surely you know the answer.