Have you given some high quality fish oil and some alcar a try? What's your diet like? You taking a decent multi vitamin? Do you exercise?
What I'm getting at is that you just seem a bit young for modafinil. You might be surprised how much benefit you'll get from exercise and good nutrition if not already in place.
I have a diet which includes all kind of diverse food, every week I eat different kind of vegetables (at least two different per day), once a week I eat fish (even though I hate it) and have a very well planned diet day by day, I balanced out all protein, carbs and fats, everyday I eat something different.
As for workout, I go to the gym 3 times a week for an hour and a half, 30 minutes of cardio and the rest is for lifting weights and power workouts.
I take Opti-Men by Optimum Nutrition, I don't take the full dose, only 2 tablets a day, it seemed to me to be more than enough, and it doesn't make my pee a bright yellow color C=
Every time I work out it seems to me like I'm dying afterwards, I feel lightheaded and it seems like I'm about to faint, I struggle through it, I sit down and after like 5-10 minutes I feel kinda better, yet
I feel very very tired all the time.
I feel like I just woke up every second of my day, and at the end of day I'm so tired I can barely get any studying done, I try to do it in the afternoon before I get sleepy.
A few things occur to me.
First, based on your statement about post-workout light-headedness, you may be working out too much and too hard. You have the classic symptoms of overtraining. I would guess that a significant fraction of your exhaustion is related to this. Walk away from the gym for a while and see if that doesn't help you out. Before you return to the gym, read up on crossfit and primal workouts. No isolation training, lots of whole body exercise, almost no long cardio, plenty of sprints, etc.
Second, you don't reveal nearly enough to indicate what you think "balanced" eating means. Your overall energy level sounds like my experience when I was on a very low fat diet, which was a disaster for my body and health. These days, my idea of balanced eating is 5% carbs, 30-35% protein, remainder fat with an emphasis on whole foods (fatty cuts of meat, organ meat, chicken with skin on (usually dark meat), LOTS of eggs, full-fat dairy, colorful and leafy vegetables, etc.). Other people have found successful balance with very different diets from mine (some even low-fat). Variety does not necessarily mean balance, as much depends on the list of options you're selecting your variety from. Can you tell us more about your diet goals/rules and a few typical meals?
Third, if you think you want Provigil (modafinil), you should take a serious look at Olmifon (adrafinil). A personal supply of adrafinil is unregulated in the US and most EU countries have a more relaxed attitudes towards adrafinil than modafinil (not true in the UK). Adrafinil is a pro-drug to modafinil and is made into modafinil in your liver. The "laser focus" effect starts much more slowly (45 minutes to an hour) and anyone diagnosed with renal insufficiency should get regularly tested while taking adrafinil, but otherwise 300mg adrafinil is nearly identical to 100mg modafinil in effect and duration at about 1/6 the price and with fewer legal hassles.
Fourth, modafinil, adrafinil and other eugeroic drugs are commonly used to manage sleepiness, but do almost nothing for tiredness. Most people don't differentiate between sleepiness and tiredness, but they are extremely different conditions in your body and your mind. If you're tired but taking adrafinil or modafinil, you just become a zombie (you're awake, but you're not really there). From your description of your symptoms, I suspect that you are overly tired, not overly sleepy. Diet, rest (distinct from but including restful sleep), stress level, exercise and fitness. Work through these first and see if you can't fix your tiredness through one or more changes. From there, if you're still stuck, I would seek some tests to rule out endocrine disorders, mono, epstein barr, and chronic fatigue (
http://www.nytimes.c...ch/09virus.html potentially associated with a newly discovered human retrovirus XMRV).
Hope this helps.