Go to a psychiatrist [aka pdoc] about your problem. I have a MAJOR Gripe about general practictioners prescribing meds for mental conditions (including depression and ADD/ADHD etc).

If you do go on meds, BE PATIENT!!!!!!
It took my pdoc and I three YEARS to find a combo that worked for me. It didn't help that I wasn't very compliant though and kept getting off the meds we tried
BUT, I also went to him initially with a prior mis-diagnosis of bi-polar disorder so we had to start from absolute scratch and he treats symptoms instead of "labels" like a lot of docs and pdocs do.

I recently went off my meds for 5 days and I remembered just why I love them so much.
I have symptoms of ADD and extreme anxiety as well as excessive day time sleepiness and possibly Delayed Sleep Phase Syndrome.
I take 80 mg Celexa and only 18 mg Strattera daily. If I need help staying awake, I take 200 mg Provigil and if I can't go to sleep I take an Ambien (I very rarely ever take Ambien though which is why I can never remember the dose lol).
My pdoc wanted to try me on Abilify last week by I can't afford it.

To give you a base line though, my youngest son is 15 years old and he takes 100 mg Strattera every day.

Be honest with your doc and voice your concerns and problem. Side effects are to be expected for up to (usually no more than) 1-2 months. Most side effects I've encountered (though it will very from person to person) is headache, dry mouth, funny taste in mouth, groggines... and did I mention HEADACHE? lol Some meds should also be taken on a full stomach.
If I don't have a big meal before taking Strattera, I feel like barfing for hours afterwards.

But sticking with the treatment plan and finding something that works makes all the difference in the world, IMHO.
And, as you're doing now, continue to educate yourself on the options available to you.

If you're living on a low fixed income, some companies (or the doctors themselves) can give you either discounts or free samples.
My hubby soesn't support my treatment. He's an Ophthalmologist and we have great insurance, but there's still a bit of out of pocket expense (AFTER insurance, for instance, my Provigil runs at almost $100. a month). I kept discontinuing my treatment because hubby grumbled too much when I'd ask for money to buy my meds.
My pdoc gives me my Strattera and Provigil when he has samples (and he almost always does). Celexa and Ambien run about $10. each so I have no trouble buying those.

One site I fell in love with for researching meds is:
http://www.crazymeds.us/

I wish you much success!!