Help please

Hey y’all I’m a little confused and need some help. I didn’t have my period December I’m pretty sure due to high stress I finally had my period this month 12-16th. I took a clear blue digital ovulation test on the 18th I got a smiling face well I know you aren’t supposed to keep testing but since my period was crazy I decided to take two more I tested on the 20th and it was negative so I waited till yesterday and tested and I got another smiling face. So now I’m confused has this happened to anyone else?