present! present? wait, wtf?

I got home to find a package waiting, which I assumed was for my birthday. And it contained jewelry! But not any indication of who sent it. And it wasn't sent from a store, but from a woman in California.

Sooooo, do I try looking up this woman's number? Ask everyone I know if they sent me a sapphire ring for my birthday? Wait for someone to ask if I got my present?