Hi,
How is the relation at the moment, did you kiss her for example? How is she reacting till now, did she call you already, did she text you? It might be wise to demonstrate some value if she didn't, so just don't call her for a couple of days.
Decide if meeting her this weekend fits your schedule. You don't have to meet her every weekend.
She might call you, and you know what you want.
If you're getting nervous, say thursday, call her. Tell some things about your week, a short funny story you heard of or something you did. Ask what she did. It really doesn't matter that much, just chat a bit, like you'd do when you meet her. At a certain point you can let her know you are busy this weekend, but this doesn't mean you don't like her. For example:
She: So what do you do this weekend.
You: I've got lots of things to do. stag night, something on friday, etc.
She: (At this moment she thinks: he doesn't want to do anything with me anymore, but says) Sounds like a lot of fun.
You: But I was thinking we could meet next week.
Make an appointment for the day only, and call her next week for more details.
You can also do a step back, just send her a light and funny text message today. Use some callback
humour as described in the text game basics by
braddock and savoy. This will build some comfort and get you into her mind again. You can call later on.
Hope this helps.