Is this normal!!

Alix

I started birth control(the pill) for the first time about a month and a half ago. I wanted to skip my period because I was going on vacation so I skipped my week of placebo pills and started the next pack. However I still got my period and I’ve had it for about 8 days now. Is this normal or should I be concerned. My periods normally last about 4 days so I’m a bit concerned hope someone can help! Thanks:)