Implantation bleeding or ovulation bleeding

I had spotting the day before after my ovulation. It's brown. I'm not sure if it's ovulation spotting or implantation bleeding because my partner and I had a contact on our genitals just a dry hump naked at first but we decided to put a condom afterwards and we didn't do penetration. In the morning i took 4 pills for yuzpe method because plan b is not available here in our country. Yuzpe method is taking 4 pill and 4 pills again after 12 hours. In my case I forgot to take another 4 pills after 12 hours.