How do I know if she got my Facebook message?

[Rae]

I may be the last person on earth who doesn't use Facebook. I created a blank profile for myself to look for an old friend I lost track of about ten years ago. I finally found her on Facebook and sent her a message. It's been almost two weeks and she hasn't responded. She's updated her page since then so I know she's been on Facebook. I guess I should assume that she doesn't want to get back in touch with me, but I have this little, 3% worry that maybe she didn't see my message. Is it possible she didn't get it? Thanks for any info.