Morning after pill and spotting

Down to the point. I had sex the 12th around mid night. So going into the 13th. Took the morning after pill within 8 hours. And then on the 16th I had spotting and light bleeding for a few days. About 4 days. That week was my ovulation week. I don't start my next period until 7 days from now. And I ended my first period on the 7th. So I was wondering. Due to hormones from the morning after pill and that fact I was ovulating that week. Could the extra hormones be the cause for my light/spotting and bleeding that week?