Hi Merelle ! 
Sorry to hear that you have more than one type of headache... 
The good news is that there are quite a lot of different therapies for SAD, so there should be one that will make some difference at least, even if you don't have exactly the same energy levels as you'd like.
Some people prefer to have a blast of light from a light box early on in the day, as a "zeitgeber" (an artificial dawn that resets your daily biorythmns and sleep/wake cycle). My personal experience of this is that I had to be careful of how much time I spent next to the light - I had it on the breakfast bar - as if I let other errands take me away from it too much I had no good of it, but too much and I would either become very irritable or very sleepy ! So prior to work I had to force myself to sit down and read for thirty minutes, but no more than forty at the most.
That's my experience, but I am extremely sensitive to sunlight levels - I get SAD about as bad as you can get it, a week's rainy weather in mid-summer will trigger it for me.
The other ways of getting your sunlight time are via the "artificial dawn" type alarm clocks, that wake you with gradually increasing levels of bright light, and full spectrum light bulbs and flourescent tubes fitted to normal household or office lights. Because the effects are very much dependent on what distance you are from the light source - a difference of even twenty centimetres makes a big difference - if using full spectum light fittings other than in a light box, you will probably need to have them on all the time. I know that you can get full spectrum office lamps from The Sharp Edge for $99; I don't know about prices for bulbs, fluorescent tubes or light boxes, but I hear they are always getting lower.
There are also LED visors which are rather like battery powered baseball caps; they have a series of differently coloured lights on the underside in front of your eyes, and because the different wavelengths of light are all reaching your eyes at the same time they trigger the same neurological effect, even though the source looks very different to sunlight.
Failing all that, you can always do what I used to do, work outside, or spend a lot of time up amidst snowdrifts that recycle all the available UV....but I don't recommend it really ! (Although it does have advantages if you like ski-ing. 
)
I spent years - a decade to be precise - trying hard to survive an unholy combination of Crohn's Disease and SAD - before I finally managed to get enough money to buy a light box. (The manufacturer had an payment by installments plan.) Thanks to that I gained enough energy to work full-time for the first time in years, and although my mood was still sometimes poor and my energy limited I never looked back. Eventually I gave up using the light box when I found Prozac did the same job for me more effectively and conveniently, as well as helping with my CD, but until the light box I was hanging on by the skin of my teeth.
Where I live - the North East of Scotland - the prevalence of SAD is considered to be almost the maximum possible (10%) and so many people have Sub-Syndromal SAD (yes, SSSAD ! )that the standard home-grown treatment is a winter holiday away somewhere sunny for a couple of weeks. This "top-up" works for a lot of folk, so you never know, you might be lucky...fancy the Bahamas..? 