Not me personally but my close friends experiences with chemistry...
Their main takeaway is that GCSE chemistry is nothing like A-level chemistry, not just on the difficulty level. Some concepts you learn at GCSE arent even used at A-level and some things you learn at GCSE level arent even correct. From what I've heard, A-level Chemistry is an extremely large step up from GCSE, probably the largest jump compared to other subjects you might take- including maths. However, if you're aiming for a course at uni that requires Chem, which many do, you may just have to persevere, If not, then I wouldn't recommend going through the stress of one of the hardest A-levels. Considering that A-level exams have already started, I have heard from multiple friends that Chem is one of the subjects who have still not finished with their content, and their exam is in 2-3 weeks which is not a lot of time if you have other exams to take. Its definitely something to seriously consider. Also, please don't base A-level choices based off GCSEs. Just because you were good at them in GCSEs doesn't mean you'll be a good at A-levels. Theres a reason why A-levels are considered so much harder then GCSEs despite only focussing on 3 subjects.
I also guarantee that A-level chem will have way more maths than you imagine, just like every other science A-level. Have a look at the Alevel specification and maybe watch some youtube videos, it'll give a greater insight to what Ive said above.