Are my frequent headaches and stomach pains related?

Hi, I am a 21-year old female who suffers from many headaches.  It seems like I have been battling headaches for as long as I remember.  When I was younger, I would get such bad headaches that I would cry all night long because I was in so much pain, enough that I wouldn't get any sleep.  At that time, my family doctor told me that the cause of my headaches was my lack of vision and that I needed glasses.  Now, I have been wearing glasses for over 15 years, and my headaches are still very present.  And that's the least of it because I often get very bad migraines as well.  They are bad enough that I feel dizzy, nauseous, and basically I am in a lot of pain.  Light bothers me, loud noises bother me, and etc.  For a 21-year old, I may be wrong, but it doesn't seem right.  I shouldn't be getting so many headaches/migraines right?  It's almost daily now, and that's not all as well.  Now when I get my headaches, I have a lot of neck pain.  My neck is always stiff and burning with pain.  My doctor tells me that my headaches have to do with my car accident a year ago, as well as my neck pain, but I have been battling headaches a lot longer than that!  And besides, it wasn't that bad of an accident. 

The reason why I write today is because I can no longer accept hearing that my headaches are probably normal.  Probably does not seem good enough any more.  I need a definite answer so I stop driving myself crazy.  And I know that this might be the only thing that you can tell me too, and if that's the case, than I still appreciate your time.  Also, I think I should mention that I get a lot of stomach pain as well.  I don't know how to really explain this but the pain only comes when I press on my stomach.  I always thought that I just have a weak stomach, but it may be more than that.  It really hurts if I accidentally poke myself, when that happens it's like a stabbing pain.  A family member told me that my headaches and stomach pain could be related to a liver problem, but I never took it seriously since this person wasn't really a health professional.  However, after my accident I started acupuncture and the acupuncturist told me that I may have a liver problem as well because I had such a weak stomach.  Again, I didn't know if I should take that seriously.  I guess this is the reason why I've also written about my stomach problem.  I don't know if the two are connected and I was hoping you can shed some light.

Thank you