Hello, I had unprotected sex at about 7pm on the 28th of August. However, I took a single dose of a levonorgestrel brand. Not convinced it would work, I bought another brand with 2 pill prescriptions. took one tablet about 30 minutes after the first and the second, 12 hours later as stated in the leaflet. I'm freaking out because I think I was ovulating on the said day. Is there a possibility I could be pregnant? My next period is supposed to come by tomorrow, but I'm scared.