Erin - I'm in your boat 9dpo today and have been getting partial ferns on and off since O. I really don't want to get excited, but... you know us ttcers! Any excuse! I often get partial ferning, just thin ones, about 3 days before AF, but these are thick, just like O ferns. And I have no other AF symptoms. But, I have also just been really sick (think it was gastro, but the ferns are making me wonder... see, any excuse! )
So, good luck! Keep us posted with your news! for a bfp for you!