How soon after pouring bleach down the drain can i shower?

I woke up this morning with a centipede in my shower so within minutes I was online looking up how to get rid of them, I read to pour bleach down the drain. So I poured a splash of bleach down my sink like it told me to but now I'm nervous to shower because I'm thinking maybe there will be fumes I'm... show more I woke up this morning with a centipede in my shower so within minutes I was online looking up how to get rid of them, I read to pour bleach down the drain. So I poured a splash of bleach down my sink like it told me to but now I'm nervous to shower because I'm thinking maybe there will be fumes I'm just wondering if anyone knows how long I should wait or if there is a waiting period before I can shower?
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