You can speak to your GP and ask for a referral to CAMHS. This is NHS funded so you will get so many free counselling sessions but these are limited and there will be a waiting list, especially during Covid. If you are able to talk to your parents about your issues then maybe they can pay towards a private counsellor as these are much more accessible more quickly. They range from around £20-£40ish per hour but are worth it and you may not need too many so could budget accordingly. Maybe they have private health care that covers you for this? My advice would be to contact your GP ASAP and get the ball rolling.