Im so stressed for some reason

I should be enjoying myself, it's the second day of my vacation but I saw my report card and it's really bad. I'm not the most studious learner but I have a good 70 percent average most times but this was down a whole 10 percent. Everyone has their dips, you can't do well all the time, I know that but I'm just so disappointed in myself. 

I'm not sure how it works in other parts of the world but these are the grades that I have to apply to university with, specifically for the exams I just wrote, if they took my results from the previous tests, I'd be in but I can't apply with this. I'm gonna stick with html and try to learn some other languages so that hopefully I can fall back on a programming career if everything fails. Then also my design teacher said that I need to complete my project during the vacation when it was only supposed to be done when I got back to school originally. She did something like this before and moved on the due dates 2 weeks closer and I became rushed and that's why I failed design. 

I'm an optimist so I'll look on the brightside. There's quite a few positives to this whole thing

I'm getting my learner's license 

I'm going to hang out with friends 

I did really well in business class and English and second language 

I'm learning html which can be reliable for when I plan to get a job next year 

I still have time to improve

And I remember on the last day of school, my science teacher said something that was inspiring. She told the class that our marks aren't a reflection of ourselves and it's just a sign of what we know and don't know in any given subject and that as long as we keep at it, we'll improve but it will be a steady progression and everyone has dips in their grades. Man, I love her, she's the best teacher I've ever had.

In the time being, I just wanna relax and enjoy my vacation, I didn't do the day 5 html BTW because yesterday's I just learnt some semantics.

 So this was day 2 of SlipMoth's endless eight, thank you for reading and please enjoy yourself whatever you're doing and does anyone have any advice for a struggling high schooler such as myself