I missed an active pill

Patient: Hello,I am taking Mono-Linyah birth control. Weeks 1-3 are my blue active pills and week 4 are sugar pills. I am on day 2 of my week 4 sugar pills (Sunday was the starting day for my sugar pills) and just realized I did not take my 2nd to last active blue pill (Friday night). In the past if I ever forgot to take a pill I would notice the next day and just double up on the active pills, however I never just not taken one and found out during my sugar pill week. Can you please tell me what I can expect and how long I am not protected for.Thank you,Lisa

Symptoms: No Symptoms