EVE app messing with me

Sometimes my bf and I will have sex without the condom at first then he'll put it on. I normally log my period time on the app calendar and just recently it has been saying 7% chance of pregnancy. Now, im supposed to ovulate in 5 days and I had a normal flowing period. So im a little confused as to how the app concludes possibility of pregnancy.. I didnt log any symptoms or sex activity either. The most I've had was bad stomach pains these last few days but still didnt log about it.

Has anyone else experienced this because now im thinking of getting a test.