I'm currently on 150mg of sertraline. I'm 17 and I have severe anxiety. Recently I've been getting a lot of convulsions mostly in my stomach/chest area. It feels like I'm shaking because I'm cold but only in my stomach region. I also feel like it's hard to breath and no matter how deep I breath I don't feel satisfied. I've also been getting a lot of stomach cramps and indigestion and bowel problems which have got worse over time, could that be IBS? I'm having a constant battle in my mind because I don't know whether these tablets are helping or I actually have IBS or I have something else or I'm never going to get better. I'm scared and I'm starting to lose hope :(