How do you know if you have brain mets

What are the signs. God just the thought of it scares me to death. If I read the article Joe put on, it seems to me that if you have her2neu++ you most likely will get it. Please tell me I'm wrong.

DX at 42, IDC, er, pr and her2neu ++, clean margins, no node or lymp involvement, 4 a/c done, 4 of 12 taxol and herceptin done. Still have 6 weeks of rads and 40 weeks of herceptin every 3 weeks.

have not had a brain scan but all other parts of bodies scans done no cancer anywhere else.

I'm just worried and most likely over reacting.

Thanks.

Joe your work on this board is wonderful and I love all the laides here, so much support and love.