If you take the eight weeks as a whole, you are bound to have days when you eat less than the 800cals and some when it is more, but over the eight week period, it will balance out. My advice is not to stress, you have been quite decently under on you cals so far, so for today, allow yourself a bit extra – even at 1050 it wouldn’t be a complete disaster. If you are hungry and you need the extra cals I would go for it – you have had an exceptional and stressful day so be kind to yourself.
I try to stick with the 800cals, but Monday it was 907, Tuesday 702, Wednesday 744 and it looks like today will top out at around 850 – if I add those up and then average it out over the four days it’s a fraction of a calorie over 800 per day.