They do Maths in a completely different way from how we were taught. I know of a few friends' children whose Maths has been completely turned round (from bottom set to A* at GCSE in one case) by a tutor. It's not for everyone and, of course, it's costly, but it might be something worth looking into for some people.
Both of mine (17 and 15) have had meltdowns in the last week. I think it's very, very normal and thank God they can let their emotions out.
I think it would be far more concerning if they were keeping everything bottled up and were unable to wail noisily about the crap teacher / sob uncontrollably about the stupid exam board/ rage angrily about the maddening person behind them who sniffed and snorted and blew their snotty nose "ALL THE WAY THROUGH THE BLOODY EXAM MUM!"
So, no, Deaddei, you are certainly not alone. It's the same in every house at this time of year and - sorry to point out the bleeding obvious - but it's every year from now on.
Breathe deeply, dig deep and count to three, then agree with everything she says, agree that it's all awful and none of it's fair, tell her (shaking your head sadly) that you wish you could do these exams for her, let her whine on and on and get it all out of her system and then give her a hug and offer to run her a bath and give her a foot massage...
Then, much later, when you've left her much calmer... think "AAAAAAAHGGGGGGGG!!!!!" and pour yourself a large glass of
.