Funny, in Mexico we use a lot "Ahorita" too, which it's just the diminutive for "Ahora" ("Right Now" in English). The word is very ambiguous here, it can mean "Right now" or "In a few minutes/hours/days" or if used sarcastically "Never".
Edit: ohh my gosh I just remembered another case where it's used for past events:
- Perdí mis llaves (I lost my keys)
- ¿Cuándo? (When?)
- Ahorita (Just a few seconds/minutes ago)