|At close range like this, depth of field makes focusing very critical. To me, it looks like focus is good, but either the flower or the camera moved a little. I can see what you were after though.
At this range, I find it useful to focus the lens manually, and then use both hands in the most solid grip position and move in and out slowly with the camera to get the final focus.
You may be able to get sharper shots by using the self timer at 2 seconds or maybe 5 seconds. That will eliminate the big shake that occurs when you squeeze the shutter button. Try looking through the camera at a subject like this with the camera turned off, then simulate a normal shutter button press, and watch carefully how much the camera shakes.