Nineteen years old symptoms and conditions

I am nineteen years old and have had migraines for most of my life. I've tried nearly everything for them , and imitres is one of the only things that makes them tolerable. However, I've found that as I continue taking the drug, i have become lethargic, chronically tired, and down in spirits. My appetite has changed, and my weight flunctuates constantly. I haven't noticed anyone else with these side effects, other than people who take maxalt. Is it just me? Please contact me... this is really starting to interfere with my life.