Catrin,
I just took a look at your gym's yoga/pilates schedule. I saw an "Andrea B" on there for reformer. I have to wonder if that's the Andrea Bergeman that head's up my yoga/pilates studio's reformer program. If so, I've heard really good things about her (although I have no direct experience with her other than in passing). Some of the other names make me wonder, too. Granted, it could be nothing but a coincidence, but there is some overlap in teachers in Indy because no one studio or gym offers enough to employ them full time. In any event, if Andrea B is Andrea Bergeman, you might reach out to her for some suggestions as to what pilates or yoga classes, if any, might be suitable for you given your current issues.
But I also tend to agree with Bluebug to some extent. I'm not sure adding something new right now is a great idea, unless you get your PT to sign off on it with some specific instructions.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher