Is birth control really that bad?

I have just recently started taking birth control pills for the first time. My first week is up and after doing so much research I feel so stressed and worried over the side effects and negative feedback from so many girls and women. Later on the chance of not being able to have children? severe mood swings? blood clotting? hair thinning? decrease sex drive? How common are all of these negative side effects and has anyone had positive results while being on the pill for a period of time? Help!