Image is a bit dark, poor scan or dark print? Handheld shot? Image seems a bit soft as well. If you have the chance try this with a tripod or some other support, looks like you could have something really good. That Pan F is hard to work with. You might try a sheet of paper or foil to bounce some light down into the flower to bring out more detail. You might also experiment with stand developing Pan F in Rodinal to bring up the shadows without losing the highlights, I've had some good results with that.