Ok, I know this is somewhat unorthodox, but I need help and can't think of anywhere else to ask. takes deep breath I am a 16 year old girl, and I would appreciate the opinions of other mums in regard to my mum's behaviour.
I was one of the many getting my GCSE results last week, and I got 5 A*s, 3 As and 2 Bs. I was predicted straight As so I have underperformed slightly. I am a little disappointed as the 2 Bs are in subjects that I worked really hard on, but am happy overall because I got into a brilliant 6th form and can do all my chosen A Levels. 
My DM, however, is not so thrilled. She thinks I have not performed to my potential, which I haven't, but I told her that I have accepted this and that I am going to really push myself in the subjects I love at A Level. However, she continues to believe that I am 'not bothered' about the B grades that are 'dragging me down' and that I need to fix my attitude, She is also constantly asking me what my peers got, which is to be expected, but irritating because many have got straight As. Even though I start college next week I just feel like she will not stop rabbiting on about results. If I try and approach the topic with her, she gets defensive (is it not a mother's right to feel disappointed, you have had every opportunity etc.)
Today I thought she might have moved on, but now she is saying things like 'everyone else has done so much better than her', 'why did she give up', 'why can't I get a break in life', 'God give me a break' etc. Part of me thinks she is just being melodramatic, but what she is saying makes me feel terrible, like I have let her down so badly.
Sorry for the mammoth post, but I would really appreciate some opinions; would you say this in front of your teenage DC, and what would you suggest as a comeback/approach to this?
Thanks so much. 