Did I use my Semi colon correctly yes or no

Sentence: I have school tomorrow; however my brother doesn't.

5 answers

Yes, you used the semicolon correctly in the sentence.
Did I use my Semi colon correctly yes or no?

I have lunch; and schoool today.
No, you did not use the semicolon correctly in the sentence.
My phone broke; therefore meaning I have to go to bestbuy today!!

Is there any error in my sentence yes or no?
No, there is no error in your sentence. You used the semicolon correctly to connect two independent clauses.