Is it possible that I could have ovulated early than expected? Because on 9/30/17 I had what I…

Is it possible that I could have ovulated early than expected? Because on 9/30/17 I had what I assumed was ovulation spotting in the morning then in the afternoon it was gone. And then on 10/03/17 I had some spotting again and now it’s 10/09/17 and if I ovulated on 9/30 I would be 10dpo right now, and so far for the past few days I haven’t been feeling much like myself and I’m kinda wondering like if I’m pregnant or not, I tested the other day and it showed up negative ( used with night time urine). Idk what to do. Is it possible I ovulated early?