I coloured my hair (foils) 2 weeks ago and I am 13 weeks pregnant this week. IMO there is nothing wrong with it. The "What to Expect.." book says it is okay as long as you are in a well ventilated area where you will not be breathing in all the fumes. As far as foils go, they don't even put the colour onto your scalp...and so little seeps in anyways when you put full colour. I am pretty laid back about these things, others may disagree with me. I coloured my hair with dd as well and no problems there.

I say if it's going to make you feel good, go for it!