I had gen testing done years ago too and from that testing my doctor at the time put me on Pristiq. It was horrible! Years later I'm now coming off just 9 days of a very low dose of sertraline - 12.5mg every other day - and I feel terrible. I didn't taper, just stopped it. My doctor said the withdrawal symptoms shouldn't be bad because of the low dose and short time I took it but it has been a month since I went off and I'm still feeling pretty bad. I don't know if I should go back on it at a lower dose and taper or just wait it out. Any ideas anyone?