Yes, to yes, to yes!!!
I feel it too. Every time, after a Rush concert, I begin to get misty thinking THIS could be the last time.
Rush has been the soundtrack of my life since 1981, and to hear that soundtrack live is other-worldly pleasure in such a big way. To even THINK this is the last time I'll ever experience this ... well ... it makes me well up a bit to tell you the truth.
I am prepared for the possible moment that I hear that one of these three guys can't play any more for whatever reason. I will need a few days to mourn the loss. And if a Rush member should die, wow, only losing a family member or a best friend would be worse losses that I can imagine. If a member of Rush dies, I'd need several days off work to mourn.
And honestly, you know what doesn't help this feeling on this tour is "The Garden". That song has such a "farewell" feel to it. It's such a good song. And it feels like the PERFECT last song on the last album. And I well up when I hear that song.
So, yeah. It's not just you.