I received a blow to the head with a blunt object about 6 weeks ago. I was diagnosed with a concussion with major symptoms lasting approx 2 weeks, minor symptoms ongoing (fatigue, dizziness) The cut itself is healing nicely, but the area is still quite tender and sore with some numbness. I also have a dent under the cut that is about 5 inches long. I never had my skull/brain examined by x-ray, CT scan or MRI. I am planning to fly tomorrow - is this safe?