Suggest Treatment For Severe Headache

So for a few years now I have been getting semi-frequent headaches. They range from above the eyebrows to the temples to the top of the head and to the back of the head...so mostly everywhere. They usually differ each time. Well my parents are stumped and my doctor see's that nothing is wrong. I have good blood pressure and am in good health so I don't think it could be anything like that. Well my mother went to get a massage the other day and got talking to her masseuse. She said that usually if you have broken your collarbone that your muscles can over extend and cause tension which can lead to/cause frequent headaches. {I broke my collarbone when I was 3 and I am now 15} I have no idea whether she is right or not but my mom wants me to go and see a massage therapist to try and work these muscles out. Is this a good idea? Can breaking your collarbone really lead to headaches even when its been so long since I've broken it? Could something else be causing my headaches? Please just give me your ideas and thoughts...thanks! =)