something happened with my photoshop

i have been sitting in front my laptop for 2 hours and my project had just finished. i didnt have any idea at all, but suddenly i thought of my blog and i decided to edit something related to sunflower. unluckily something had happened with my photoshop. i tried to edit this sunflower photo using my usual way, but it turned out nothing. i was stressed enough and i bbm stella asking for this. she said something might had happened with my photoshop. at last i end up duplicating the part i want to photoshop.

before
|
|
V
after

im still an amateur in editing photos ew