Okay, so I've joined up with a concert band, and this is the first time since I was a kid where I'm playing with a conductor.
As it turns out, apparently I have ADD - just found this out. This explains a lot...
...specifically, how easy it is for me to get lost in this situation. The other things in my life would take a whole book, but I digress.
When I'm playing bass guitar or upright in other situations, I don't seem to have this problem. I think it's because I can key off words and even when there aren't words, chord changes are pretty obvious - or I can get a cheeky glance at the guitarist and know what I should be playing.
For me, it seems like missing a single beat is enough to send me completely into lost-ville because I'm sight reading stuff I've never seen before - or in some cases never heard before.
It's sort of frustrating, because you can plop a chord chart in front of me, and between that and listening to what's going on, I can come up with something with ease. In fact, I often prefer to just come up with my own stuff rather than learning someone else's lines.
In contrast, this concert band is combining playing what someone else has written with having none of my usual crutches to lean upon.
The easy solution would be to bow out, but I don't want to do that - I'm stubborn and I'm treating this as an opportunity to develop.
I'd love to hear any advice from people who have ADD or ADHD who have managed to find success in these sorts of environments in spite of their issues.