I have been on sertraline for anxiety for a year at 50mg and was doing really well until April this year. My doctor increased my dose to 100mg and after the first week things seems fine again. Until the past 2 weeks, I have had really bad depression with bad headaches, no appetite or motivation to do anything, feeling really low and “empty,” and constantly tired even if I have slept all night after an hour of being awake, I feel like I need to sleep. Has anyone else experienced this? I think 100mg might be too high for me since 50 mg worked wonders for a year. Planning on ringing my GP on Monday for an appointment.