Im not sure when For all we know it could be 50 trillion years away or it could have already started just we cant see it yet because of the light delay as the galaxys aren't moving faster then the speed of light. So we're litrally in the dark on what the universe is doing right now because we can see light millions and billions of years old but not what is happening today in alpha centurai.

And i completly agree the universe cant keep expanding forever it just gives me a queezy feeling in my gut and my gut feelings are never wrong.