I used to have a similar fear, and in my own experience, sometimes medication can have really horrible side effects that can be pretty scary. Something that helps for me (and I would consult with your doctor before adjusting your medication) is to start at an extremely low dose and gradually increase the amount I'm taking over the course of several weeks. This helps me avoid a lot of the negative side effects.
I don't know what other remedies you've tried, but there are alternatives to medication, and those are always worth looking into. For me, medication has really helped, but I know it's not the right path for everyone.