One missed pill and an early period?

Jen

This past Friday I accidentally missed my pill, so I took it on Saturday with the Saturday pill. I have since taken my Sunday and Monday pill normally and had protected sex. I started spotting on Friday and today the spotting turned into heavy bleeding and cramps- like a period. However, I am only on week 2 of my pills.... Has this happened to you guys before? Should I continue taking normal pills or ask my OBGYN?