anyone like this?

Sometimes I think about scenarios which freak me out. 
I was thinking of the first time my daughter would go to the beach and how her father would slowly teach her the waves and put her in the beach...then bam! I think what if a wave comes and tips them over and she's lost in the sea? Now I'm afraid to take her to the beach 
We have stairs in our house and every time someone else other then me brings her down and up my heart jumps a bit because I'm afraid as hellll that they're going to fall and injure my baby 
Im so scared something is going to happen to her, I have thoughts like this at least once a day... is this normal or do you think I should see someone?