I keep thinking the teenage stage has come and gone but then it comes back even stronger lol

This time I have suddenly been seeing a lot of regression of behaviours ESPECIALLY needing to put everything in her mouth including cig butts on our walks 🤢. We haven't dealt with that in months. Just looking to see if this is all normal and that people have come out the other end 😅. I hate to say it but it's been really frustrating…