Please don't stress. They move A LOT right now. Depending on where they are, the kicks will change. I'm also 22w and sometimes I don't feel her for hours, then she has a spazz attack and ninjas me for an hour lol. I'm sure all is well
Yes they can change their intensity daily reasoning being they change positions and whatnot. It is a reasonable fear though but as long as you're getting at least 10 movements per hour all is normal. :-) esp since you have an app tomorrow and if you feel it necessary you can ask for a stress test to help put your mind at ease. :-)
She's still moving a lot and kicking as well it's just not that strong like 2 days ago.
As long as she's moving you're probably fine until tomorrow morning :) but if you feel like something is really wrong then of course call/ go in sooner. Good luck ♡