Has anyone tried group singing or singing in a choir whilst having PCS?

I took part in a vocal workshop where we had tasks singing as a group. Not songs so to speak but pitches or tones as games.

This was primarily for fun but a noticeable side-effect was that I felt my headache, which had been constant and debilitating for 18 months, disappear.

I can remember and pinpoint the feeling in my brain being like a switch turning on. Weird!

The headaches did come back when I was exposed to too much light/sound/stress/etc. but after that I had periods where I was headache free for hours and then days at a time.

I'm almost three years in now and not 'better' but singing has helped with certain symptoms and aspects of PCS - Depression, socialising, focusing on other things....

I was wondering if anyone has had any similar experiences?

Thanks.