Hello icpgirl1

I lifted this off of the Ortho Tricyclen Lo website

ORTHO TRI-CYCLEN LO has a low incidence of breakthrough bleeding and spotting—an inconvenient and sometimes embarrassing side effect. In a clinical study, fewer than 1 in 5 ORTHO TRI-CYCLEN LO users reported these potentially embarrassing side effects in their first month on the Pill.

So it seems that your breakthrough bleed is not abnormal, but if I were you I would go and have a chat with my GP just incase this pill isn't the right one for you (every woman has different needs). S/he will either reassure you that this is fine or give you a different pill.

Hope this helps, and come back anytime if you have another question (or just to let us know what happens)

Pern xx