Help! Could I be pregnant?

Ive been on the pill for almost 3 months now this is my 3rd month pack, but I had unprotected sex on my placebo week on my 2nd month pack and i said sex on the 3rd week of my active pills on my 3rd month pack.. he never came but there was precum. i always take my pills on time, am i still protected on my placebo week? could i be pregnant?