Struggling with Impulsivity and Bipolar Disorder

Do you consider yourself to be a particularly responsible person? When you're manic does that have any impact on your impulsivity? I'm wondering because i tend to be very stringent with some things, like spending money.... Spending money has always terrified me. I do get impulses to spend and usually do end up falling to them and spending way more than i am comfortable with and regretting it--but it's not so bad that i end up with literally nothing. $60-$100 dollars feels like a HUGE amount of money to spend....and, relatively, it honestly is. On a few occasions i've spent more (one time, i spent 1k in a sitting...which was half of what i had), but it was also usually during times i simply had more. But it's not like i'm completely draining my bank or thoughtlessly charging credit cards. But, again, spending money terrifies me. Because of this, my therapist thinks i might not actually be bipolar and i am insanely confused about it at the moment.