need help!!

Laura

so I tested myself today because I just got these in the mail and I stopped my period may 2 and it said on my app my ovulation day was the 13th. I havent had regular periods because I got off my nexplanon birth control in January and I had stopped getting my periods for 4 months so I had my first period in February and my second period in the ending of April into may. so what do these lines mean. I'm new to this so I need help