How to increase Oxygen levels

You could be experimenting the symptom imperative -- your mind scrambling to find a new location to store tension now that it's old tactic has been upended. I do remember a few nights like the one you describe early on when I would wake up with a symptom, remind myself it was TMS, go back to sleep and wake again with a different one before they'd all taper off. After going through the recovery process, I usually assume that any kind of symptom I experience is tension-related or a conditioned behavior unless there's good reason to think otherwise.