Hello, got bitcoin core and am confused
All addresses Bitcoin Core generates will be permanently stored in your wallet.dat. It now depends on what your "complication" was. If you just pressed "receive" again and generated another address, you've got nothing to worry about, your money will show up once Bitcoin Core is fully synchronized.

If your "complication" included that you've removed Bitcoin Core in between and also deleted your wallet.dat, your money would probably be lost.