Hiya bubbles, I am on sertraline and have been since august this year. I was on 50mg to start with and was prescribed 100mg after 4 weeks. I havent had any side affects but I do sympathise with you over your mouth problems as I had terrible trouble reguarding infections in my gum for over 3 years! Luckily they have gone now (touch wood). I hope you will soon feel the benefit of taking sertraline soon as I really do think that it helps me.