Different brand sertraline making me sick

[jogalong]

My pharmacist dispensed me a different brand than my usual one of sertraline this month and 6 days into taking it I feel horrendous. Blinding headache, low mood, argumentative and just crap. It feels like im coming down iykwim?
Has anyone else experienced this with change of brand. Or is it all in my head???

I wouldn't have thought the brand change would have this effect providing the ingredients are still the same. Is it possible you have picked up a cold of some sort?