Ovulation ?

Chelsey
Im really confused! I have been tracking my opks since I stopped my period on the first and my highest opks was on the second and 3rd and today is suppose to start my fertile window but my opks are barely showing anything. I had a period from the 11-14 and then again from the 25-1st so could it have been I ovulated earlier right after my second period and the lines just didn't get dark? I'm confused.