My stepmom thinks my main problem is I worry too much. Since I was always worried when I was little -er what my mother would do next. Now that my mother's not really in my life anymore, my stepmom thinks I need to latch on to something to worry about because it's all I know how to do. She seems to believe that things have gotten as bad as they were with my moods, but that my current meds are keeping me much more stable and I just worry about any slight mood shift thinking it might be the start if an episode or something, thus making everything worse

Okay, so how do I stop worrying so much?