Home teeth gel whitener

Before i knew i was pregnant i remmber using this at home tooth whitening gel  and im sure it was veryyy early on my pregnancy /: sometimes i would use it everyday but sometimes just once a week and i made sure not to swallow anything. I am so paranoid right now. What if it affected my baby somehow? /: i havent used it in weeks now i am like 6 weeks pregnant according to the online calculator.