When I first started taking it, I was really groggy in the mornings, I just wanted to sleep all day lol. But that went away fairly quickly.
It's natural to be nervous the first few times you take prescription medications. I remember the first time I was prescribed meds for my migraines; I looked at the huge list of side effects and panicked! I was so sure that I was going to end up with all of the side effects. After a while I became much more relaxed about it, but still, whenever I see "weight gain" on the list of side effects I cringe and watch my weight very closely for at least a month.
Every doctor is different, but if the pills help at a lower dosage, not many of them will see a reason to up the dose. However, if they start becoming ineffective, your doctor may decide to up the dose a little.