Hi! I'm new to the forum; have been reading up on henna for the past few days here and elsewhere. Finally took the plunge and purchased henna. It's now on my head (and all over my bathroom) with 2 hours to go. Hopefully, I won't have a horror story to share. By the way, my instructions said 1 to 2 hours (it's from Henna Color Lab and has other herbs added for medium brown). Does that sound right?