getting zero because I shared my work with someone else...my college offers might get withdrawn

I know it’s my fault to send my work to someone else… I’m just typing here to vent to someone…
I shared my work to someone just to stop him from asking me everyday…I didn’t know he would copy the whole thing and turned it in as his own.
Now I am getting trouble with the teacher. My grade dropped from A to C because of the zero, and it’s really hard to bring my grades up coz it’s a hard class.
it’s my last semester in high school, I am really worrying about my college offers now. I got an offer from a good school and I don’t think they accept Cs (especially when I had an A first semester and dropped to C second semester).
The good thing is that I really learned a lesson. Don’t share my work and don’t trust anyone…

It is your final grade that really matters. As long as you are above a D, you are okay.
it is better to learn this lesson in HS than in college where the penalty could be worse.