Yeah, even people with all 9s and all A star predictions get rejections from some uni courses as there are just too many people. You too might get rejected…but you’d be the same as the others applying who usually find if they go for maybe 3 or 4 of the big name Econ courses, only get 1 offer.
So, if you’re going for something ultra competitive, go into it knowing you’re unlikely to get all offers anyway. It won’t be due to your GCSEs. Make sure you’ve got a couple which are not quite so competitive…doesn’t necessarily even mean they want higher grades. Your GCSEs will be more than adequate as long as you’ve got the needed A Level predictions.
Everyone is worried others are better than them. Your grades are great.