I think daughter was bitten by Spider. How to get rid of them.

I think my daughter was bitten by spider for the last two night. She is only two. It happened during the night and I happened saw a little black spider on her bed.
It is terrible. I just wonder is there anybody here knows how to get rid of spiders from home? Any suggestions.
My home is pretty clean and do not know where spider is coming from. Actually it happened weeks ago and I can not tell what bit her until I saw the spider in the morning.

Thanks for any answers.