Ovulation testing and early peak

Now I know that the ovulation tests are not 100% accurate but they’ve been pretty spot on with this app. I start testing the day after my period is done. I had a week late period last month which messed up my whole cycle. That never happens. I was getting low peak up until today I got a solid smiley face on my test. Has this happened to anyone else? I even tested my temp everyday and not fluctuations in that.