[Adam the Fish]

If you're managing, then I guess you're...not?

But it does sound like you're doing a lot, and you do need to be very careful that you don't take on too much, because additional stress won't help you an awful lot.
If you're enjoying what you're doing, don't need to do anything else, are getting good sleep and keeping stress levels down to an acceptable level, then - especially as you're helping others in what you're doing - I don't see any reason for you to cease doing so.

However, you do definitely need to be careful that you have the ability to prioritise if something else does come up, because you don't want to end up taking on too much. For now, though - keep going, if you can manage.