I think the "time" is whenever it's something that *you* think is important to pursue.

I don't know if there is a distinct line that you have to cross in order to be described as "needing" to see a therapist (which is what it feels like you are asking to me), you could simply make an appointment with one for the purpose of finding out what it's like, what they have to say about where you're at, if it feels helpful and so on (and make the decision about whether to make another appointment later on).

I mean, you might be all worried that you "should" be seeing a therapist and s/he might tell you just need to take a vacation!

(I don't mean to minimize any potential distress you may be experiencing, I'm just trying to point out the possibility that sometimes things turn out differently from what we expect, so it's usually worth exploring them.)