Confused about OPK testing after miscarriage...

April • We are finally pregnant with our rainbow baby! TTC’d for 13 months for first angel baby. TTC’d for this rainbow baby for 18 months.

I recently just finished my first normal cycle following a natural miscarriage in early July. I started OPKs from Clearblue Advanced three days ago and I had low results yesterday and the day before. Today however I got the flashy smiley face meaning high fertility on CD 8. I have never gotten high fertility results this early in my cycle before. Could this be due to my miscarriage? I have heard that you are more fertile following a miscarriage but I am just a little worried that I'm getting high results already. Any advice or has anyone experienced this before and still conceived that same month?