Positive then negative on the same day!!???

Clair

Ok so yesterday afternoon (approx 1pm) I took the below yesterday and it is a clear positive! Sooooo happy then I took another approx 6pm and this came back negative! I’m hoping it’s due to my wee being concentrated and that when I test in morn I get my positive again!!! I’m really confused right now! Can anyone share their experiences with this and came out with a positive