Is this how its supposed to be or is this a sign...

As
Last year after having my tubal reversal surgery in April, we got pregnant in July. I had ovulated on the fourth right on track with the Glow predictions. We had a miscarriage after only a couple of weeks. We had another one in March of this year. Last month my cycle came on two days early which changed my most fertile day in the app by a couple of days. So July 4th is actually my most fertile day again. Is this a coincidence? Should I still have the same ovulation date a year later after two miscarriages? Or is this a sign? We officially started trying again this month. I'm so hoping for a BFP!!