Cramping

I just lost a baby on June 29th and had a d&c the next morning we were 14w4d along. It took me 6 weeks to the day to post d&c to have my first cycle. I've had it and I am currently on my last day of ovulation according to the app. But I've had cramping and light spotting when i wipe randomly the past few days. Is there a chance I may have gotten pregnant prior to the apps scheduled ovulation time. I imagine it would be too early for implant ion cramping and bleeding if it happened this week during the ovulation period the app shows.