Help me with my daughters name!! PLEASE!!!?

It depends on if you like either of those nicknames. People get nicknames all the time that sound nothing like their names - so I would not be worried what other people think. But, I think it's important you (or your daughter) actually likes it. Because children - in time - will be able to master sounds and will mesh with your pronounciation. So, even if she cant say "Brina" now, she will eventually.