accidentally dyed my hair BLACK / opinions??

so I have naturally ashy/dirty blonde hair and for the last year my hair has been an auburn/red color and I LOVE the way it looks on me. my mom used to be a hair stylist so she always insists that she knows everything about hair and so she wanted me to let her redye my hair since it was faded and I had roots. I use professional hair color as it is (redken color gloss) and she wanted to try something else to make it better so she wanted to try a different mix of dyes and said that it would still be the same color just less patchy, well I washed the dye out and it’s BLACK with some red streaks throughout it. I wanna cry I look like morticia addams. school starts in 2 days and I feel so insecure and I don’t have time or money to fix it in time. so please give me your honest opinions. how bad is it? the first picture is what it was before she dyed it and the second is my hair now.