I need advice on haircolor and henna(Please help)

[kim]

Ok, so I have previously used henna. About two months ago I used Clairol haircolor in Natural Blue Black. It took pretty well(it was still a little hard to cover all the henna), but it is now starting to fade some. I can see a little of the red tint coming back(just a little). I would like to get my hair a nice auburn shade. I really would like to start using henna again, but I'm wondering how I will achieve my color. Should I just start doing henna applications? Or should I try and lift the black out first? Another option- I know color isn't suppose to lift color, but I don't know how many times I have put a lighter color over jet black to lighten my hair and it has worked. Should I do this and then henna? Please help!!!!!!!