please help me I am struggling . Feeling very low tearful and anxious . I am on sertraline 75 mg doc wants me to increase to 100 mg im afraid to do that im scared of side effects as I had such a hard time starting tgese at 50 and increasing to 75 . I have an underactive thyroid am low in ferritin just finished a 2 week heavy period . I'm tired and can't think straight about wat to do . Please I have little support can someone advise me . If it's my thyroid or iron problem making me feel like this why does doc want me to increase sertrsline . I'm scared of doing wrong thing . I just don't want to feel like this wen I wake up that everything is such a struggle .