I want to have a job during the summer, but I have some personal problems?

I'm a student at a secondary school and am currently finishing my GCSE course. I'm 16 years of age and would have the sort of mindset that you'd find unusual. I feel guilty when I'm not working towards some sort of schedule, I feel 'down' due to how my brain has the habit of over-thinking things until I MASSIVELY worry about the consequences (e.g. My GCSE exam results this year and last year were on my mind every second that I was off school, It's painful, and extremely hard to describe).It is some~what genetic too, my father had the same problem. What I'm asking is - should I really be worrying? Should I really be getting a job soon? Do I need to start a sport? Lastly, I need to know if getting a job at my age is a necessity for me, I've been in this same house for 2 weeks straight, just doing nothing but watching Breaking Bad until I'm ready to sleep. I feel guilty and shameful for not having some sort of occupation at my age, I feel sick. I want a job but I'm spending a lot of time going on holidays/vacations during the summer, which are family holidays (so It's kind of compulsory). Do I need to tell the employer that I'm gonna have to spend a lot of time off, or is that a rude question to ask? I'm very confused and just lonely at the moment. Very lastly, and the worst of it by far is how hard I worked/revised for my exams (GCSE's) but I still feel like my results will be absolutely terrible, plus to make matters even worse, my Dad has bought me a new phone ( an iPhone), and must have cost a fortune, if you can cross-reference this gift to my mindset, you'd be aware that I'd feel guilty. One more thing, my grandmother saved up around £1500 for me, for when I grow up, I'm grown up now and feel ashamed of myself for having that money, due to the fact how I didn't earn It. It's one massive cycle of disaster, I'm scared to even ask for anything or take any money out to deposit, as the same level of guilt comes back like a knife to the back. Do I need counselling or something?

You could get a volunteer job and give back to the world without directly earning the money you have. The right volunteer job would give you some schedule, make you feel and be more productive, and put people around you who feel good about you being there, which in turn will make you feel more like a valuable person.

It's possible you would also benefit from counselling. If you want to apply for summer jobs you need to tell them your plans up front or you will feel even more guilty- then they can decide for themselves if it works for them or not.