I have been on sertraline 25mg for 10 days now. And today was the worst day of side effects. I woke up feeling depressed took my scheduled dose fell asleep looking forward to waking feeling good as that has been my pattern for the last week. Instead I woke up tired, still depressed had pretty bad diarrhea and had this weird vibration in my head that caused mild anxiety and fear. Been sleepy all day. I was supposed to up my dose from 25mg to 50mg on day 7 but didn't, why am I feeling this way. I am sad because I thought I was making good progress and now I just feel terrible. I have an appointment with my GP tomorrow I just need some reassurance. Please help.