Yeah. Basically same here. Sometimes I'm fine for 10 minutes, others it's 10 seconds. Then something clicks and before I know it I'm hyperventilating. No need to be sorry - it's literally never impacted my life until this mask thing beyond having been really fidgety with scarves or jackets(but I hadn't known why at the time).

Edit: got a msg about this comment about contradictory statements; ".. Two sleepless nights after wearing it" and "sometimes it's fine for 10 seconds..."
No, dumbass. I'm saying it's a problem for me after a certain amount of time. Being forced to do so once it's flipped that switch is when it's a problem. Often that means going in to buy gas wouldn't always be a problem, but doing a grocery shop is.

Yeah. Basically same here. Sometimes I'm fine for 10 minutes, others it's 10 seconds. Then something clicks and before I know it I'm hyperventilating.

No need to be sorry - it's literally never impacted my life until this mask thing beyond having been really fidgety with scarves or jackets(but I hadn't known why at the time).