Can anyone please help as I'm at a lose as where to turn I've been on sertraline 50mg for 2 weeks after being switched from chlompramine which I was on for 27 years on doctors advice, thing is this weekend my anxiety levels have heightened and my phobia of choking has come back with a vengeance, I've spoken with my gp today who said this is pretty normal and should settle again in a couple of weeks. Does anyone have any experience of this?