Don't worry this can be corrected. You should see your doctor to evaluate where you still have movement on the lateral aspect of the forehead and glabellar area between the eyes. Often the muscles that are relaxed have to be balanced with the muscles that are still working to have a natural look. This is not uncommon when you inject only the forehead. With any experienced injector, this is a quick fix best done about 7 days after your initial treatment once the Botox has fully kicked in.