I’ve been on birth control for 9 months. I usually always take my placebos up until I get my period which is usually the fourth day. This pack though, I only took 2 of the placebos because I lost the pack, and am just waiting until Wednesday to start my new pack. I didn’t get a period this week. I was supposed to start on Saturday, but never did. Could it be because I only took 2 of my placebos? I’ve been quite nauseous and my stomach hurts. I’ve already taken two tests. One on my expected period date, and one the following morning, both negative.