I am always amazed when I see these “am I screwed” posts.
No, you are not screwed. You will get in where you get in. If your stats are as you say they are, you will go to a fine college. Does your hard work only pay off if you go to an elite college? That is ridiculous. Read this thread: http://talk.collegeconfidential.com/college-admissions/1878245-straight-up-advice-about-getting-into-top-colleges-for-the-average-excellent-student-p1.html
There are thousands and thousands of students who work really hard and dont get into elite colleges. You might be one of them, but maybe you will get into a great college where the students aren’t cut throat and there is some other great factor that Harvard doesn’t have.