Should I be really worried about getting pregnant?

It is a week before my period starts. Twice, maybe three times this month and in the same week almost I missed a pill one day and took it the next. My boyfriend and I had sex one of the days I took two and between the times I misses pills and toom teo... Should I be overaly worries about getting pregnant? We use withdrawal and the pill as birtg control metgod, and timing (no sex when ovulating). Yes, should use more protection but innthe heat ofthe moment we forget.