Ovulation date changed!

Hi everyone! I'm a newbie to Glow. My DH and I have been TTC for the past 5 months. I just started using Glow last month. I charted my AF days to see when I would be ovulating. It initially showed that my peak day was 1/28. After entering in AF days for the previous 5 months or so, the days of my fertile window changed. It now says my peak day is 2/3?? Is it going off of my average cycle days? 
My DH and I were busy trying the week leading up to 1/28. Clear Blue Advanced has indicated Low the past 4 days now. I don't know when I'm supposed to be ovulating. 😔 Has it already passed? Any help or thoughts appreciated.