Bleeding during the pill.

Gi

Hey ladies. So tonight I'm terrified. I've been using Vestura birth control for 3 months now and for the first time, im bleeding a little mid way of the pack. I'm 2 weeks ahead of my period so it can't be that. Am I pregnant? I'm always off maybe 10 minutes on my pill everyday. I never take it the same exact time. What could be causing this sudden bleeding?