I didn't get what I wanted in my AS's last year, I had pretty good GCSE results but didn't do enough work for a levels, I wasn't doing great most the year and I didn't feel like the teachers wanted to help me last year in my AS levels I got
Biology-D
History-C
Chemistry-U
Maths-D
This year I went to college to retake the year, quite a few people at the college were doing the same and no one really cared that you were retaking the year. My AS results from this year
Biology-A
Chemistry-A
Maths-A
Psychology-B
You need to ask yourself if A levels are what you definitely want to do, did you do well in mocks but just panic in the exams? Did you put in the most work you could? Do you genuinely believe you can do a lot better this time round. I don't know your results but if you want to continue this year it is possible to pull your grades up if you are committed and work hard but bear in mind there are no January exams so you will be left with A LOT of exams in the summer which may not be ideal if you are struggling now