Mid cycle follicle scan

I had my mid cycle follicle scan today and it was so exciting! I am on cycle day 13 (2nd cycle of letrozol) and I had a 23mm and 16 mm on one ovary and 24 mm on the other. She said that it looks like the edges are starting to blur meaning I will ovulate soon or am starting to ovulate? Which is exciting except that my opks have been very very negative...hoping that I will ovulate and that's it's not just a fluke! It's hard to be hopeful when everything usually goes against us!