Ovulation

Gabriela
I've been TTC for 9 months now and this is my 2nd month using ovulation kits. Last month started testing on cd 10 until about cd 15. Got my positive on cd 13 but wanted to test for 2 extra days just to make sure. This month I started, just like last month, testing on cd 10. But to my surprise I got a nice big smiley. I'm a little confused, isnt it too early to be ovulating? I'm testing again tomorrow with FMU. Any advice or insight is greatly appreciated. Thanks on advance.