Hello, I'm sure that this question gets asked a lot but I would like somebody to answer my question please because I'm confused!

Well I have natural Arburn hair and I have totally ruined it over the years dying it blonde bright red and dark brown. Ive had it dark brown for about 2 to 3 years now and I want it to come out. Ive had hair stripper used on my hair before when I dyed it a blondish colour and then I dyed it dark red but my friend put too much on the roots and it went purple and the stripper took it all out and my hair was a light blonde colour afterwards but this was done the day after I had it coloured.
Now I decided to let it grow out as I'm pregnant and I thought I wasn't supposed to dye my hair but my friends had it done and she's pregnant and she's fine and so is her hair so I want to dye mine its like very light brown red at the top and dark brownish at the bottom and I know if I dye it now it won't go right.
Soooooooooo my question, I don't really want to use a stripper on my own because ill do it rong and I've tried home remidies and they don't work so I was woundering if I bleached my hair would I be able to dye over it again with my desired colour which is a dark arburn colour??