Your body is probably just getting used to the new hormones in the pill. Any time you start any new pill you are suppose to give it three months to regulate. So, if your period is not normal after three months, then you may want to consider switching pills. But, right now with your spotting, it is most likely normal.
As for ibuprofin. I know that it thins your blood, but I am not sure if it actually affects your period or not.
If you get any serious side effects from your pill then you can ask your doctor to switch before the three months is up, but if it is just minor like breakthrough bleeding in the first month then don't worry about it.
If you continue to bleed and it is bothersome, just call your doctor and see what he/she tells you to do.