Hair Dye and Pregnant!

Okay, well I'm not pregnant yet, but plan on coming over here in a few days when I test (wishful thinking lol). Anyways I dyed my hair a horrible shade of blonde that just isn't me and need to change it back to my natural color. I found Lush's Henna Hair dye which is all natural/vegan hair dye and was wondering if anyone else had heard of it/used it/ got the okay from their Doc to use it. It's all natural and I know that pregnancy can make everyone's body react a little weird but what do you guys think? Here's the list of ingredients ​