Need advice


So my boyfriend and I had unprotected sex a week ago. I took the morning after pill around 42 hours after it happened and 3 non placebo pills of my contraception around 30mins after. I asked my pharmacist and she told me to go onto the non placebos to get my period and take a pregnancy test.I only have one placebo pill left and still no period. But I took a test and it came up negative???

Help me!