It generally has a negative connotation in the context of therapy, so what you describe (looking for support when you normally tend to be quite hesitant) does not sound like acting up/acting out. It is usually a behavior that is inconsistent with therapy goals or therapy itself, sometimes directly sabotaging. Doing the same things that we otherwise want to change. For me, it was mostly engaging in addictive behaviors and distractions (my main issues). I think sometimes progress comes after several rounds of acting out, in which case it is not necessarily too bad if not dangerous or too extreme.