<human>: Can you summarize the given text in a few sentences?

So this happened a while ago but I am now feeling the repercussions of my actions.

So basically I'm a 17 yr old male, who has been looking forward to  the day of getting his first car since the day I walked into the dmv and earned my license with my finesse driving. I was told by my parents that if my GPA was high enough I would get to choose my car. (My family rewards excellent grades with excellent rewards) Going into my junior year, my GPA was 4.21, I naturally thought that my trend of good grades would continue. Unfortunately I was wrong. I failed my advanced physics course and  barely passed pre cal. My junior year GPA plummeted to a 2.93, making my cumulative a 3.53. I spent the entire year hiding my grades from my parents, especially these past few weeks. When the final report card gets mailed home. I checked the mail for weeks, but i never saw it. Then yesterday at dinner my dad slid a brown envelope across the table. He told me it was sitting in the home office for over four weeks!!!! And couldn't help bit open it.
<bot>: Didn't check the mail for my report card hard enough, now no one will see my finesse driving in a whip.