Praying for your healing, TA. Are you drinking enough? Perhaps add an extra qt. of water to your daily routine? Are the head aches cyclic in nature, more frequent any time during a typical month? Have you done a food/activity HA log to see if there are any triggers? Are you getting enough sleep? Perhaps see a nutritionist. You are very right in that they could be related to a prior head injury. But, even then, there may be some things that can be done. A skilled physical therapist (not me) may be able to treat some underlying craniosacral, alignment, connective tissue issues.