What should I do?

I work as a talent acquisition. I'm new to the corporate world and this is my first job. There is one job opening which I'm supposedly helping the recruiter to source for candidate. I'm not the owner of the opening. I'm just helping her to search for additional talent if have any.

Today, out of nowhere she told me that she had given me the opening to take care of and I'm in charged of the entire thing. So all this while i have been doing passive search for her and it has yielded no result.

Now, tomorrow i have a stakeholders meeting and since the opening is now mine, what should i do?