Hair dye

Hi girls, has anyone bleached their hair using these? I wanted to dye my hair, got all the stuff and was reading through the box/paper it comes with and it says “do not use if you are pregnant or on pregnant woman” but google said its fine to bleach my hair?

Can i bleach it using this? Im 4-5 weeks pregnant and i suffered a miscarriage (partial molar pregnancy) in november so im really trying anything possible to avoid that happening again. Please let me know girlies❤️