As reguarding Hair dye , about 90% of clients have their hair dyed when they are Pregers, I find it very hard to beleive that hair dye will go through the hair shaft and in to the blood stream!!!
The only thing I would say changes in pregnancy is that you may become elergic to the chemicals due to hormone change, the test will be done with tint ans put behind your ear or inside your arm and left there for 24 hours and in this time if there is any irritation then you should not have it done . 
I dont know how to advise you as it is very your decition , if it were me I would do the test and if ok just do it!!!, my opinion may not be the case with everyone but I have been hairdressing 23 years non stop and I have asked LOREAL about this recently.Hope this helps
Everyone
Having a bit of a Sh1t Week what with the STEPSON!!!! but we will work it out , as you know Marion(X) and her husband and Cam and I get on very well to the point I look after their 2 year old son along with the boys sometimes , so we will get through it , she is chucking him out when he is 16 (2 years ) but Im afraid he will expect to stay with us , I DONT THINK SO!!! anyway I have been for my fourth acupuncture and chinease meds and feel great for it , also remember last year I had 23 day cycles well 2 cycles ago was 33 days and last cycle 27 , Im on day 28 today , sods law cause I wanted my FSH done before we see the consultane on thursday, oh well what will be will be ! I have done a test and it was - but will test again in 2 days
miricles do happen ! I had my cards read yesterday and she saw 2 children both mine! she is fantastic at it and not a frawd I had her 2 years ago , she lives in Newcastle and came down to do 5 of us. She said quite alot that was true . Cooki my cat is doing very well and looks as though he may be sticking around for a bit longer. Could bear loosing him , he has been my baby for 18 years . Enough rambling , Im going to check the testers for this week .Have a good weekend
Trace x