I had a friend who did, but that was because they went on meds, and that helped them with focus, so outside of that (which may not be entirely relevant) I haven't seen anyone, you can absolutely try though. One of my best recommendations, and what I've personally used for my revision for years now, is to just run through a past paper, and assess where exactly you're losing marks (sometimes it's just AQA's rank stupidity, if they're your exam board, but there ain't much you can do about that), remember to be specific here, not just 'silly mistake' but look at what exactly lost the mark, if it's from misremembering definitions or phrasing, then you need a flashcard with that, if it's something like organic synthesis, and needing to get better answering technique (for instance, you may struggle with a certain type of question), then you just need to do a lot of those to get a feel for it (this is what I did with vectors and planes in further maths), if you're struggling with content, then you could try to look for alternative resources (e.g. savemyexams, physicsmathstutor, seneca, etc.) but before that, you should try asking your teacher, as I'm sure they'll be more than willing to explain it (they've made their job professionally talking about chemistry, after all)
it's also often good to have a mental checklist for a question (for instance, when I finish an inorganic question, I quickly run through a few steps: (1) re-read the question and make sure I've answered the right thing, e.g. given pKa when they've asked for it and not accidentally given Ka, then I (2) check if it's the right order of magnitude (roughly), in the case of Ka, I'd expect something around 10^-5, for pKa, around 10^0, so if I get something well out I should check again (this is, again, something you build up after doing many questions, but generally mols is in the order 10^-3, that's the one I always apply, and probably the most useful sanity check, although obviously it can be outside of that), finally I (3) check that I've given the correct number of sig figs (or decimal points), the rule for this is your answer should have the same sig figs as your least accurate data input, e.g. if I have 22 grams of hydrogen and I'm calculating mols, and I use Mr = 1.008, I'll give my final answer to 2 sf, as 22 is 2 sf and less accurate than 1.008), but feel free to make your own, this is something you make by looking at your own mistakes and altering it to help catch them
Hope this helps and best of luck
