Irregular periods

I forgot Monday and Tuesdays pill and took both of those Tuesday night and I took Wednesday’s pill on time and I started bleeding then it quit and yesterday I started bleeding again. This has been happening since December when I had sex last and then my period came a week early and lasted for a whole week which I never last a week I usually last like 4/5 days. Iv been on the same birth control for 5 years. I’m 19 and recently started working out. Should I be concerned or contact a doctor? I’m not supposed to get my period till next week. It’s just irregular and it’s never been irregular. Iv always bled on the same pill of every pack and I don’t know what’s going on now.