Yes. Ideally you don’t bleed at all on the mini pill but irregular bleeding is a very common side effect. Cramps are also a common side effect of the pill.
As you’re now on a synthetic cycle and no longer get normal natural periods, any bleeding is not a “period”, it’s just breakthrough bleeding, a side effect of the pill. You are no longer “due” a bleed. Bleeding on the pill is not necessarily a sign that you’re not pregnant but not bleeding doesn’t automatically mean you’re pregnant either. So bleeding/not bleeding doesn’t really mean anything.
Using the pill correctly and accounting for anything that decreases its effectiveness is how you know you’re not pregnant.