Panic attacks?

Is this normal.

Sometimes if I an laying in bed half asleep I start to vividly picture something horrible happening to my child. I have no control over these thoughts. Its like intrusive. It makes me sick and scared. I start to get really paranoid and want to bring her to bed with me to make sure she will be okay.

I would never hurt her. Its not about that. Its about me not being able to help her if something bad were to happen. I full on panic though when it intrudes my mind. I hate it cos I cant control it!!

She is 3 months old btw..

But does this happen to anyone else ?