Two days late

Heather

This is month six of ttc. I was nursing once a day for a few of those months so we decided to go ahead and stop nursing. Had period since 3 months pp. cycle pp have ranged from 26-31 days but the last 4 months it’s been 28 days or less. Usually start two days prior to what app predicts and I usually spot two days before. Here is my FF graph. Just not sure what’s going on. I don’t really have symptoms one way or the other. I usually had cramps and backache before af. Tested today bfn but couldn’t get positive until about 14 dpo with my first pregnancy. Possibility that the graph is off by a couple of days. Anyone know what might be going on?