Ovulation test

Okay so I just got ovulation tests today . Before I scanned one into my app it said I was suppose to ovulate today but then I took it and scanned it and now it’s saying I ovulate in 2 days . I’m very new to this and I was just wondering could I have already ovulated or am I going to ovulate in 2 days ? I don’t wanna waste my test if I already ovulated . I just got my test in the mail today and I couldn’t help but take one and it also pushed back my start date of my period after I put a pic of the test in .