intrusive thoughts....

ever since my baby was born 11 months ago I've had intrusive thoughts about something bad happening, for example: when I'm bathing her I'll get images in my head of her drowning, when I'm carrying her down the stairs I'll think omg what if I fall and I kill her? or when she's in the car I have images of us crashing :( and a whole lot more... I've never let her out of my sight because I worry something will happen. I don't leave her alone with family which means I don't get a break because I'm so scared they might do something wrong or not know how to soothe her... is this normal? I'm tired of worrying that she will die 5x a day or that I'll die and she won't cope without me.