How does a streak work?

I’m still sort of new to the app and am trying to understand how it works and how they figure the streaks and estimate the amount of time until you rewire your brain completely. My app says I have a 19 day streak, but I have told it that I relapsed twice in the last week. Am I supposed to reset the streak myself? Or is that assumed to happen during the 3 month course of rewiring the brain? Are you allowed to relapse and maintain a streak? That doesn’t make any sense to me. My guess is I am supposed to reset the streak myself? Thanks in advance!