I have made a couple of attempts at church services, especially for family events, like a recent baptism... and I paid for it for days...
In my opinion, who ever you believe to be the head of our universe, understands that church venues are a bad place for someone with PCS, as they are the one who creates all, the good, the bad, and PCS.
I had a hard time coming to this conclusion. However, I've found that reading scripture and praying and meditating silently, helps to bring me closer to my creator, without the symptoms. I'm sure he understands why I am worshiping this way right now.
Hope you can find a way that works for you! Best wishes