GA4 has been acting weird for a week now at least, like cutting traffic in half, and the next day it is normal again, or depending on the period of time I select, the graffics are different than 'the last 30 days". While my ads income and stats has a normal , growing flow. 
I read on X that lots of people have the same issues with GA4. How can I interpret statistics well if it acts like this grrrrr?
thanks!

Lizzy