Hey gentlemans

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I agree with Jando but it really depends on what happened between the girl and you.
1. If you just talked to her, had a nice conversation and got her number the best thing is not to call her. She won´t have any ponit in seeing you because she isn´t attracted.
2. If you had a makeout/fucked her with it depends if you/she wants more. Usually I test it with a litle routine:
-I am going to study next year in XY so we won´t be able to se us often. Thats why I don´t think it will work with us.
My weekend girl told me we would manage it and she will try to visit me as often as she can.
If it was just a makeout/one-night-stand for her you will notice it.
If it was more for you and her I would call her 2 days after.
If she doesn´t answer the phone or call you back forget about it.
Long story short: It really depends on the sitatuion. If the situation is still hot I would call her 2 days after and make up a date.