What does this mean ?

So i been taking ovulation tests to detect if i am fertile or not, This my first cycle ever trying this. It was negative all last week. This Monday I took one but it didn’t read it ig i put the stick too early and it was a dark line for lg, the next day (tuesday) i took a test

and it was a smiley face, i waited til (26) and it was still a smile face, I waited two days again (28) and it was negative. Does that mean i was fertile during those 4 days? is that normal ? or did i ovulate after the last day of me trying ? The red hearts are the days I had unprotected sex. When was i fertile or was i not even fertile ?