Not only Pep Guardiola but Manchester City as a club are beginning to lost momentum, I think it's an era coming to an end because for Manchester City to seat in such position in the beginning of a season means that something is not right some how, if I'm to be Pep Guardiola I'd take a shot break to cool off the tense.
I understand how you feel. It's not just you, all of us, especially Manchester City fans, are disappointed with the team's underwhelming performance at the start of the season. However, this cannot be used as an excuse to say that Manchester City has lost all momentum. The fact is, they still have a chance. With hard work and consistency, it is not impossible for them to catch up in the standings.
This is still the early stages, Pep Guardiola has undoubtedly already devised the best strategy to ensure Manchester City can survive this season. It is precisely at crucial moments like this that a manager's true quality is tested, and Guardiola will certainly work twice as hard to prevent a repeat of last season, where Manchester City endured a season filled with disappointment and tears.