Future Events and Our Actions

If we are working on a model for a future event, are we just “guessing” what our actions will be? For example:
C- Appointment with old lash stylist
T- She’s probably going to judge me for leaving her and coming back
F- embarrassed
A- Am I just guessing what I’ll do because I can’t be certain. Fumble over my words, offer apologies, not sure how to converse or what to talk about, hesitant, wonder if she’s judging me
R- I’m judging myself and possibly judging her

Since the appointment is in the future, I can’t be sure of how I will act. These are possibilities. Is that what we do? Just guess on how we will act according the feeling our thought triggers?