Another note…
Everyone has family issues. Everyone has some kind of struggle at some point in their education.
I know you aren’t failing, but you are going into a tough major. Once you are in college, using family issues to explain failing grades will not cut the mustard, barring truly traumatic family situations. You are expected to succeed in college and your grades reassured them when they accepted you that you probably can succeed. But their goal is to keep bottoms in seats. They would rather not have to deal with putting students on academic probation and so forth.
Once you get to college, there are many resources to help you succeed, so don’t be proud. Take advantage of it all. And if you think maybe things are too tough at the moment, maybe consider a gap year and give yourself time to mature.
They have wait lists for a reason. So again, talk to your GC because given their statement, it might be better to act soon, rather than waiting for the axe to fall.
Edit: @amnesiac2004 I just saw your post. Why should you get to do extra things to improve your grade? Do others get that opportunity? You had chances to improve your grades during the school year. Your teachers can’t just do something for you and not for others.