Some advise would be appreciated, I'm a little confused

Ok so I Pmed a lady earlier today about arranging an appointment for tomorrow.

So I've received a friend request in reply to my Pm and nothing more. Now I didn't send a friend request, so it wasn't a case of the lady in question, just accepting friend requests and including me.

So what do I do now ? As I am keen to arrange something for tomorrow, I don't like leaving things to the last min.

I'm not too keen on sending another Pm, as I know she has received the first one and I think sending another would be a bit much.

Maybe she just wants to be friends

Or maybe she had a look at my profile and decided no thanks !