Stressed

Okay so I'm just doing too much right now I do athletics on Tuesdays Thursdays and Sundays and at school after school on Wednesdays and swimming on Fridays but I need to change to 3 times a week as I chose gcse pe and need to get a gala filmed and I do a fashion club all morning on Saturday and volunteering in a charity shop once a week as I do duke of Edinburgh and need to do a skill volunteering and physical and on top of that I need to go to the gym twice a week as my gym membership only expires in October as my mum payed a year in advance and I wasn't that busy when I started and on top of that again I chose gcse art so I need a lot of time for that so I'm just stressing someone help me out or reassure me or something:(